Design patterns implemented in Java
Free and Open, Distributed, RESTful Search Engine
As easy as /aitch-tee-tee-pie/ Modern, user-friendly command-line HTTP client for the API era. JSON support, colors, sessions, downloads, plugins & more. https://twitter.com/httpie
Everything you need to know to get the job.
A utility-first CSS framework for rapid UI development.
RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.
Google core libraries for Java