Partial (and outdated) list of modules that require('sys').

require.sys.txt

amfnode-1.0.0
android-0.0.8
app-bundle-info-0.0.8
automato-0.1.25
awo-client-0.0.6
basetis-styles-css-1.0.1
beeminder-1.0.2
bitcore-multicoin-0.1.13
bluestorm-0.1.3
build-static-0.1.6
calipso-0.3.54
cloudelements-cmtool-0.2.6
connect-yii-0.0.11
eclipse-flux-0.1.3
eibd-0.3.0
ember-cli-clean-0.5.2
ember-cli-compass-compiler-0.0.18
epm-0.3.29
ethsset-1.2.3
extract-cli-0.0.9
faker-2.1.3
firebird-0.0.13
foreman-gui-1.0.3
generator-ionicparse-0.0.23
generator-python-package-0.1.4
generator-rf-0.4.1
generator-wp-plugin-boilerplate-powered-0.1.8-a
get-telehash-0.2.2
github-sync-0.1.9
gitlab-ci-webhook-0.0.1
globalsign-0.0.1
grunt-control-django-0.1.3
grunt-docular-0.2.4
grunt-jade-mod-1.0.0
grunt-jasmine-node-0.3.1
grunt-start-servers-0.0.4
gtp2ogs-4.2.12
hexo-heroku-auto-publisher-0.0.7
hopper-0.1.1
htmlbook-0.1.4
ionic-1.4.5
ionic-app-lib-0.0.22
jasmine-poster-1.2.0
jolokia-1.0.7
jsio-2.1.0
karma-notify-send-reporter-0.0.3
lettuce-0.2.4
literate-jasmine-0.1.2
log4js-extension-0.6.24
mb-cli-0.2.5
mdcv-1.0.5
memcached-flags-2.1.2
minode-0.1.8
mithril-coat-0.1.5
moqi-cli-0.0.4
mysql-factory-0.2.9
nan-summit-0.1.23
nassau-https-proxy-0.1.7
ncpt-0.0.21
neo-msgpack-js-0.3.1
neo-msgpack-rpc-0.0.1
node_amf_cc-1.2.2
node-cjs-deps-0.2.2
nodeinjection-0.0.5
node_memcached-1.1.3
nodm-0.1.11
noflo-runtime-webrtc-0.0.5
npmdoctor-0.0.2
npm-registry-couchapp-2.6.9
olx-0.0.3
omise-0.1.2
openautomation-0.0.1
orm.js-0.5.6
pas-2.1.3
pdf-extract-1.0.8
pdf-extract-rs-1.0.0
phpjade-1.2.0
phpstorm-exclude-1.0.7
pm2-0.12.15
pm2.5-0.0.128
pm25-0.0.128
pm2-interface-2.0.4
protractor-watcher-plugin-0.0.2
pure-boots-0.1.2
pushbots-cli-0.0.2
rdfstore-0.9.6
react-extension-manager-0.1.3
recordrtc-5.1.0
rfswcmd-0.0.12
rimg-0.1.0
rrunt-0.2.0
sails-generate-raml-scaffolding-0.1.2
sherrie-cmd-fis-0.0.11
silk-msgpack-0.2.6
silk-msgpack-rpc-0.0.3
simpleportal-0.2.17
sip-0.0.2-42
ssh2-multiplexer-0.0.7
ssl-manager-1.0.1
steroids-4.1.5
summit-0.1.22
superdeis-0.0.5
tishadow-2.8.2
tosr0x-1.0.0
twitch-cli-0.0.2
vik-0.3.2
vizionar-0.1.3
vodkakit-3.0.4
wordcut-0.7.5
xbee2-0.0.2
xl-repo-linker-0.0.13
xy-dashboard-0.1.52
yorequire-1.0.0