- https://cockpit-project.org/
- https://sensu.io/
- https://icinga.com/
- https://www.nagios.org/
- https://prometheus.io/
- https://www.monitorix.org/
- https://checkmk.com/
- https://grafana.com/
- https://graphiteapp.org/
- http://munin-monitoring.org/
- https://www.zabbix.com/
- https://www.nginx.com/resources/wiki/
- https://www.nginx.com/
- https://nginx.org/
- https://forum.nginx.org/
- https://hg.nginx.org/
- https://amplify.nginx.com/
- https://status.amplify.nginx.com/
- https://trac.nginx.org/
- https://university.nginx.com/
- https://cs.nginx.com/
- https://mailman.nginx.org/
- https://demo.nginx.com/
- https://www.debian.org/
- https://backports.debian.org/
- https://packages.debian.org/
- https://wiki.debian.org/
- https://security-tracker.debian.org/
- https://www.canonical.com/
- http://www.ubuntu.com/
- https://ubuntuforums.org/
- http://manpages.ubuntu.com/
- http://packages.ubuntu.com/
- https://help.ubuntu.com/
- https://wiki.ubuntu.com/
- http://askubuntu.com/
- https://launchpad.net/ubuntu/
- https://apps.ubuntu.com/
- http://community.ubuntu.com/
- http://design.ubuntu.com/
- https://developer.ubuntu.com/en/
- https://insights.ubuntu.com/
- https://ubuntu.cloud/
- https://shop.canonical.com/
- https://www.centos.org/
- https://seven.centos.org/
- http://planet.centos.org/
- https://bugs.centos.org/
- https://wiki.centos.org/
- https://lists.centos.org/
- http://vault.centos.org/
- http://mirror-status.centos.org/
- https://www.centos.org/forums/
- https://www.virtualbox.org/
- http://www.parallels.com/
- https://www.vmware.com/
- https://www.qemu.org/
- https://www.linux-kvm.org/
- https://xenproject.org/
- https://www.microsoft.com/en-us/evalcenter/evaluate-hyper-v-server-2019
- https://www.brightbox.com/
- https://www.scaleway.com/
- https://www.heroku.com/
- https://aws.amazon.com/
- https://azure.microsoft.com/en-us/
- https://cloud.google.com/
- https://www.digitalocean.com/
- https://www.linode.com/
- https://www.vultr.com/
- https://www.rackspace.com/
- https://distrowatch.com/
- https://www.linux.com/
- https://serversforhackers.com/
- https://www.linuxjournal.com/
- http://www.opsschool.org/en/latest/
- https://gnupg.org/
- http://tldp.org/
- https://gpgtools.org/
- http://ss64.com/
- https://xkcd.com
- https://www.linuxquestions.org/
- https://ubuntuforums.org/
- https://linux.die.net/
- http://forums.justlinux.com/
- https://lwn.net/
- https://www.linuxfoundation.org/
- https://www.comodo.com/
- https://ssl.comodo.com/
- https://www.startssl.com/ (free)
- https://www.digicert.com/
- https://www.globalsign.com/en/
- https://letsencrypt.org/ (free)
- https://www.symantec.com/ssl-certificates/
- https://www.geotrust.com/
- https://www.rapidssl.com/
- https://www.digicert.com/
- https://www.identrust.com/
- https://sslmate.com/
- https://www.ssls.com/
- https://www.gogetssl.com/
- https://www.thawte.com/
- https://buy.wosign.com/
- https://certsimple.com/
- https://www.positivessl.com/
- https://www.entrust.com/
- http://www.cacert.org/
- https://hydrantid.com
- https://howhttps.works/
- http://safecurves.cr.yp.to/
- https://cc.dcsec.uni-hannover.de/
- https://checktls.com/
- https://gethttpsforfree.com/
- https://www.whynopadlock.com/
- https://www.keylength.com/
- https://tls.secg.org/
- https://www.google.com/transparencyreport/https/ct/
- https://bettercrypto.org/
- https://scans.io/
- https://certbot.eff.org/
- https://shaaaaaaaaaaaaa.com/
- https://whatsmychaincert.com/
- http://disablessl3.com/
- https://certificatechain.io/
- https://certificate.revocationcheck.com/
- http://www.selfsignedcertificate.com/
- https://sslanalyzer.comodoca.com/
- https://crt.sh/
- https://www.sslshopper.com/
- https://cfssl.org/
- https://hstspreload.org/
- https://certificate.revocationcheck.com/
- https://badssl.com/
- http://breachattack.com/
- https://securitychecklist.org/
- https://www.howsmyssl.com/
- https://letsencrypt.org/
- https://www.ssllabs.com/
- https://www.sslforfree.com/
- https://httpswatch.com/global/
- https://site-inspector.herokuapp.com/
- https://edell.tlsfun.de/
- https://testssl.sh/
- https://ssl-tools.net/
- https://mozilla.github.io/server-side-tls/ssl-config-generator/
- https://certificatemonitor.org/
- https://cipherli.st/
- https://www.digicert.com/help/
- https://www.sslchecker.com/
- https://poodle.io/
- https://ssldecoder.org/
- https://istlsfastyet.com/
- https://drownattack.com/
- https://www.certificate-transparency.org/
- https://www.htbridge.com/ssl/
- https://mozilla.github.io/http-observatory-website/
- https://freakattack.com/
- http://heartbleed.com/
- https://weakdh.org/
- https://sslspdy.com/
- https://https.cio.gov/
- https://censys.io/
- https://haveibeenpwned.com/
- https://zmap.io/
- https://domainscope.com/
- https://www.wormly.com/test_ssl
- https://httpoxy.org/
- https://www.nartac.com/Products/IISCrypto
- https://spdycheck.org/
- https://starttls.info/
- https://luxsci.com/extranet/tlschecker.html
- https://xmpp.net/
- https://certificatedetails.com/
- http://checktls.com/
- https://twofactorauth.org/
- https://tls.imirhil.fr/
- https://observatory.mozilla.org/
- https://cryptoreport.geotrust.com/checker/
- https://zerossl.com/
- https://www.certificateautomation.com/
- https://www.sslforfree.com/
- https://gethttpsforfree.com/
- https://snuck.me/
- https://shattered.it/
- https://tls-observatory.services.mozilla.com/static/ev-checker.html
- https://howsecureismypassword.net/
- https://securethe.news/
- https://filippo.io/Heartbleed/
- https://tools.keycdn.com/
- https://redbot.org/
- http://dnssec-debugger.verisignlabs.com/
- http://tools.maxcdn.com/
- https://dev.windows.com/en-us/microsoft-edge/
- https://opendevicelab.com/
- http://labs.jensimmons.com/
- http://www.pearsonitcertification.com/
- http://webkay.robinlinus.com/
- http://adamwhitcroft.com/batch/
- https://fortawesome.com/
- http://fontastic.me
- https://thenounproject.com/
- http://evil-icons.io/
- https://icons8.com/#/ios
- http://glyph.smarticons.co/
- http://jxnblk.com/geomicons-open/
- https://icomoon.io/app/#/select
- https://design.google.com/icons/
- http://app.fontastic.me/
- http://blacktie.io/
- http://fontawesome.io/
- http://fontello.com/
- https://simpleicons.org/
- https://erikflowers.github.io/weather-icons/
- https://fortawesome.com/sets
- https://design.google.com/icons/
- https://icons8.com/
- http://simpleicon.com/
- http://icon-works.com/
- https://www.transformicons.com/
- http://subtlepatterns.com/
- http://www.flaticon.com/
- https://worldvectorlogo.com/
- https://octicons.github.com/
- http://svgporn.com/
- http://www.kameleon.pics/
- http://www.webalys.com/
- http://www.ego-icons.com/
- http://www.streamlineicons.com/
- http://www.nastyicons.com/
- http://www.vectorian.net/
- http://vorillaz.github.io/devicons/
- https://linearicons.com/
- http://ux.streamlineicons.com/
- http://linea.io/
- http://www.emoji-cheat-sheet.com/
- http://emojipedia.org/
- http://getemoji.com/
- https://emojiprinter.com/
- http://emojione.com/
- http://twitter.github.io/twemoji/
- http://emoji.codes/
- https://www.emojidex.com/
- http://emojicopy.com/
- https://securityheaders.io/
- https://httpsecurityreport.com/
- https://www.httpvshttps.com/
- https://httpstatuses.com/
- https://www.httpvshttps.com/
- http://isthewebhttp2yet.com/
- https://http2demo.cloudflare.com/
- http://http2.loadimpact.com/entry/
- https://nghttp2.org/
- https://daniel.haxx.se/http2/
- http://intodns.com/
- https://howdns.works/
- https://use.opendns.com/
- https://developers.google.com/speed/public-dns/
- https://www.whatsmydns.net/
- https://dns.google.com/
- https://sslmate.com/labs/caa/
- https://dnsrecords.io/
- http://csptester.io/
- http://www.cspplayground.com/
- http://cspisawesome.com/
- https://report-uri.io/home/analyse
- https://report-uri.io/home/generate/
- https://content-security-policy.com/
- http://www.webpagetest.org/
- http://tools.pingdom.com/fpt/
- http://jankfree.org/
- https://csstriggers.com/
- http://www.perf-tooling.today/
- http://imageoptimization.info/
- http://perf.rocks/
- https://www.lighttpd.net/
- https://httpd.apache.org/
- http://trafficserver.apache.org/
- http://tomcat.apache.org/
- http://nginx.org/ & https://www.nginx.com/
- http://www.iis.net/
- https://h2o.examp1e.net/
- https://eclipse.org/jetty/
- https://www.litespeedtech.com/
- http://netty.io/
- http://open.litespeedtech.com/mediawiki/
- http://www.haproxy.org/
- https://varnish-cache.org/
- http://cherokee-project.com/
- https://fontawesomecdn.com/
- https://www.jsdelivr.com/
- https://aws.amazon.com/cloudfront/
- https://www.maxcdn.com/
- https://cdnjs.com/
- https://www.cloudflare.com/
- https://www.keycdn.com/
- https://www.akamai.com/
- https://www.bootstrapcdn.com/
- https://www.incapsula.com/
- https://www.cdn77.com/
- http://cdnsun.com/
- https://www.fastly.com/
- https://www.cachefly.com/
- https://npmcdn.com/
- https://ns1.com/
- https://www.cachefly.com/
- https://angularcdn.com/
- https://www.jsdelivr.com
- https://www.namecheap.com/
- http://www.freenom.com/en/index.html
- https://www.gandi.net/
- https://iwantmyname.com/
- https://www.namebright.com/
- https://www.godaddy.com/
- https://mediatemple.net/
- https://domains.google.com/
- https://www.networksolutions.com/
- https://domainr.com/
- https://www.dreamhost.com/
- https://www.siteground.com/
- https://www.bluehost.com/
- https://www.name.com/
- https://www.hover.com/
- http://www.enom.com/
- https://www.dynadot.com/
- https://www.crazydomains.com/
- https://www.1and1.com/
- https://www.moniker.com/
- https://www.register.com/
- https://www.domain.com/
- https://internetbs.net/
- https://cart.web.com/domain/wizard
- http://domainhelp.com/
- https://www.101domain.com/
- https://uniregistry.com/
- https://www.hexonet.net/
- https://www.uniteddomains.com/
- http://gridbyexample.com/
- http://stateofwebtype.com/
- http://oocss.org/
- https://en.bem.info/
- http://cssguidelin.es/
- http://bradfrost.github.io/this-is-responsive/
- http://overapi.com/
- http://w3c.github.io/elements-of-html/
- http://www.utf-8.com/
- http://idgettr.com/
- http://www.webbrowsercompatibility.com/
- https://cooperpress.com/
- http://caniuse.com/
- https://www.tunetheweb.com/
- https://www.chromestatus.com/features
- https://dev.windows.com/en-us/microsoft-edge/platform/status/
- https://www.mozilla.org/en-US/firefox/releases/
- http://css3test.com/
- https://html5sec.org/
- https://html5test.com/
- http://cssstats.com/
- https://jonassebastianohlsson.com/criticalpathcssgenerator/
- https://disqus.com/
- https://developers.facebook.com/docs/plugins/comments/
- https://whois.icann.org/en/
- https://www.whois.net/
- https://who.is/
- http://whois.domaintools.com/
- https://dnsimple.com/whois
- http://www.gandi.net/whois
- https://www.namecheap.com/domains/whois.aspx
- https://dns.he.net/
- https://ns1.com/
- https://www.cloudflare.com/dns/
- https://www.rackspace.com/cloud/dns
- https://freedns.afraid.org/
- https://www.cloudns.net/
- http://www.geoscaling.com/
- https://www.rage4.com/
- http://www.buddyns.com/
- http://cdncomparison.com/
- https://constellix.com/
- https://www.cloudflare.com/
- https://www.cloudns.net/
- https://freedns.afraid.org/
- https://dnsimple.com/
- https://dnsmadeeasy.com/
- https://www.easydns.com/
- https://packagecontrol.io/
- https://github.com/Monnoroch/ColorHighlighter
- https://github.com/weslly/ColorPicker
- https://github.com/BoundInCode/AutoFileName
- https://github.com/sindresorhus/sublime-autoprefixer
- https://packagecontrol.io/packages/Seti_UI
- https://github.com/kkga/spacegray
- https://github.com/chriskempson/tomorrow-theme
- http://flexboxfroggy.com/
- http://flexbox.help/
- https://en.bem.info
- http://oocss.org
- http://css3please.com
- http://learnlayout.com
- http://cssspecificity.com
- http://www.csszengarden.com
- http://wtfhtmlcss.com
- http://pxtoem.com/
- http://expressjs.com/
- http://socket.io/
- http://mean.io/
- https://nodejs.org/en/
- https://iojs.org/en/
- https://www.npmjs.com/
- https://perf.email/
- http://webopsweekly.com/issues
- http://www.devopsweekly.com/archive
- http://javascriptweekly.com/issues
- http://esnextnews.com/
- http://css-weekly.com/archives/
- http://webtoolsweekly.com/#archive
- http://webanimationweekly.com/
- http://csslayout.news/issues
- http://html5weekly.com/issues
- http://responsivedesignweekly.com/archive
- https://web-design-weekly.com/archive/
- http://androidweekly.net/
- https://iosdevweekly.com/issues
- http://statuscode.com/issues
- http://frontenddevweekly.com/issues
- http://www.phpweekly.com/archive.html
- http://www.pythonweekly.com/archive/
- http://rubyweekly.com/issues
- https://webplatformdaily.org/
- http://nodeweekly.com/issues
- http://mobilewebweekly.co/issues
- http://adripofjavascript.com/archive.html
- http://dbweekly.com/issues
- http://postgresweekly.com/issues
- https://wdrl.info/archive
- https://httpsweekly.com/
- https://jekyllrb.com/
- http://jekyll.tips/
- http://jekyllcodex.com/
- http://jekyllthemes.org/
- https://jekyllthemes.io/
- http://themes.jekyllrc.org/
- http://jekyllbootstrap.com/
- http://yeswejekyll.com/
- https://drjekyllthemes.github.io/
- https://codepen.io/
- https://jsfiddle.net/
- https://jsbin.com/
- http://dabblet.com/
- http://www.sassmeister.com/
- http://www.es6fiddle.net/
- https://repl.it/
- http://babeljs.io/repl/
- https://google.github.io/traceur-compiler/demo/repl.html#
- http://cssdeck.com/labs
- https://jsconsole.com/
- https://thimble.mozilla.org/en-US/
- https://codio.com/
- https://embed.plnkr.co/
- http://marksheet.io/
- https://filezilla-project.org/
- https://panic.com/transmit/
- https://cyberduck.io/
- http://www.coreftp.com/
- https://winscp.net/eng/download.php
- http://fireftp.net/
- https://www.gftp.org/
- https://security.appspot.com/vsftpd.html
- https://www.smartftp.com/
- https://www.flashfxp.com/
- https://www.globalscape.com/cuteftp
- http://25.io/mou/
- https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet
- http://joncom.be/experiments/markdown-editor/edit/
- http://daringfireball.net/projects/markdown/dingus
- http://kirkstrobeck.github.io/whatismarkdown.com/
- https://help.ghost.org/hc/en-us/articles/224410728-Markdown-Guide
- http://www.markdowntutorial.com/
- https://en.wikipedia.org/wiki/Markdown
- http://dillinger.io/
- https://daringfireball.net/projects/markdown/syntax
- http://packetlife.net/media/library/16/Markdown.pdf
- http://heckyesmarkdown.com/
- https://pandoc.org/try/
- https://daringfireball.net/projects/markdown/dingus
- http://commonmark.org/
- http://handlebarsjs.com/
- https://shopify.github.io/liquid/
- https://mustache.github.io/
- http://www.embeddedjs.com/
- https://mozilla.github.io/nunjucks/
- http://akdubya.github.io/dustjs/
- http://html2jade.org/
- https://pugjs.org/
- http://fontdeck.com/
- https://www.fontspring.com/
- https://www.youworkforthem.com
- https://typekit.com/
- http://www.colophon-foundry.org/
- https://www.myfonts.com/
- http://www.a2-type.co.uk/
- http://www.aisforapple.fr/
- https://code.org/
- https://bento.io/
- https://www.codeavengers.com/
- https://www.khanacademy.org/
- https://codehs.com/
- https://www.udacity.com/
- http://sqlzoo.net/
- https://www.freecodecamp.com/
- https://www.coursera.org/
- https://dash.generalassemb.ly/
- http://nodeschool.io/
- https://www.codecademy.com/
- https://www.codeschool.com/
- https://teamtreehouse.com/
- http://intensedebate.com/
- http://web.livefyre.com/
- https://disqus.com/
- https://developers.facebook.com/docs/plugins/comments
- http://www.wufoo.com/
- https://cse.google.com/cse/
- https://swiftype.com/
- http://www.addsearch.com/
- http://www.discourse.org/
- https://www.kinvey.com/
- https://parse.com/
- https://surge.sh/
- https://pages.github.com/
- https://beegit.com/
- http://word-to-markdown.herokuapp.com/
- http://prose.io/
- http://cloudcannon.com/
- https://www.netlify.com/
- http://harpjs.com/
- https://www.harp.io/
- http://www.sublimetext.com/2
- http://www.sublimetext.com/3
- https://panic.com/coda/
- https://macromates.com/
- http://macrabbit.com/espresso/
- http://brackets.io/
- https://atom.io/
- https://code.visualstudio.com/
- https://www.jetbrains.com/
- http://www.barebones.com/products/bbedit/
- https://coderunnerapp.com/
- https://www.mozilla.org/en-US/thunderbird/
- Apple Mail
- Microsoft Outlook
- https://git-scm.com/
- https://www.mercurial-scm.org/
- https://subversion.apache.org/
- http://www.nongnu.org/cvs/
- https://www.rabbitmq.com/
- http://couchdb.apache.org/
- https://www.mongodb.com/
- https://sqlite.org/
- https://mariadb.org/
- https://www.postgresql.org/
- http://www.mysql.com/
- http://redis.io/
- http://www.qbittorrent.org/
- https://www.utorrent.com/intl/en/
- https://transmissionbt.com/
- https://www.bittorrent.com/
- https://www.bitcomet.com/en
- http://deluge-torrent.org/
- https://www.codeux.com/textual/
- http://colloquy.info/
- https://weechat.org/
- https://irssi.org/
- http://limechat.net/
- https://adium.im/
- http://komanda.io/
- http://xchat.org/
- https://itunes.apple.com/us/app/linkinus/id402390998?mt=12
- https://itunes.apple.com/us/app/linkinus-for-ipad-irc-client/id364899309?mt=8
- https://whatcms.org
- https://www.punycoder.com/
- http://mct.verisign-grs.com/
- https://www.ghostdo.com/
- http://logo-hunter.com
- http://oops.re
- https://www.brandsoftheworld.com
- http://regexr.com/
- http://www.bash.academy/
- https://crontab.guru/
https://openvpn.net/