Rust
www.rust-lang.org
v8
v8.dev
Unito
unito.io
SaltStack
www.saltstack.com
Runnable
runnable.com
RubyGems
rubygems.org
Undertow
undertow.io
Ruby
www.ruby-lang.org
UIkit
getuikit.com
Tsuru
tsuru.io
RuboCop
github.com
RPM Package Manager
rpm.org
Tuts+
tutsplus.com
rollup.js
www.rollupjs.org
stylus
www.stylus-lang.com
Ricoh
www.ricoh.com
Subversion
subversion.apache.org
Rollbar
rollbar.com
Stylelint
stylelint.io
RocksDB
www.rocksdb.org