These are my tools. There are many like them, but these ones are mine. Without me, my tools are useless. Without my tools, I am useless.
Target Process
https://www.targetprocess.com/
Free! Allows you to do scrum/kanban/etc. Could be as simple as a task list, or you can create crazy complex workflows between lanes/views/etc.
Toggl
https://toggl.com/app
Free! Really simple time tracking. Aside from the great UI, I also like this one bc they support importing via CSV and a bunch of other formats. I tend to log time in a text file when I'm really busy, and I was able to quickly format that in Sublime & upload it.
Heroku
https://www.heroku.com/home
Free mini server instances (required 8hrs sleep for free dynos I think).
mLab
https://mlab.com
MongoDB hosting with a free tier.
Redsmin
https://www.redsmin.com/
Free Redis hosting tier.
Digital Ocean
https://digitalocean.com
Awesome, developer friendly server instances, starting @ $5/month.
Docker
https://www.docker.com/
Like VMs, but better.
Ansible
https://www.ansible.com/
Provision servers programatically & automatically.
Loggly
https://www.loggly.com/
Log aggregation & search, with a free tier.
Sematext
https://sematext.com/
Log aggregation with Kibana support, with a free tier.
GitLab
https://gitlab.com/
Free, unlimited private repos & project members.
NPMS
https://npms.io/
Better NPM package search UI.
Gulp
http://gulpjs.com/
Flexible, scriptable task runner for various things, but specifically helpful to transpile code & watch files w/reload on changes.
Dummi
http://dummi.io/
Generate dummy data.
Generate Data
http://generatedata.com/
Generate dummy data.
Hipster Ipsum
https://hipsum.co/
Generate funny, dummy text.
Restify
http://restify.com/
Almost fully compatible with Express, but designed specifically for APIs, with features like caching, throttling, and versioning.
Passport
http://passportjs.org/
Federated, multi-platform authentication, including social auth.
Mongoose
http://mongoosejs.com/
ODM for MongoDB
Sequelize
http://docs.sequelizejs.com/en/v3/
ORM for SQL
Mocha
https://mochajs.org/
Tests.
Pusher
https://pusher.com/
Real-time events pub/sub via sockets.
Winston
https://github.com/winstonjs/winston
Flexible, pluggable logging agent with many transports to popular log aggregation services.
Regexr
http://www.regexr.com/
For those times when you need to...
DevDocs
http://devdocs.io/
So many docs, no distractions, works offline.
Mailgun https://www.mailgun.com/ Free service to send emails programatically, with a great API.