Simple to use library for animating color change for ActionBar, NavigationBar, and status bar. Apply background tinting to the Android system UI when using KitKat translucent modes.

A data-binding Presentation Model (MVVM) framework for the Android platform.

ColorMixer is a widget for choosing a color in HSV color-space.

Conversations is an open source XMPP (formally known as Jabber) client for Android 4.0+ smart phones.

Features:

• End-to-end encryption with either OTR or openPGP
• Sending and receiving images
• Indication when your contact has read your message
• Intuitive UI that follows Android Design guidelines
• Pictures / Avatars for your Contacts
• Syncs with desktop client
• Conferences (with support for bookmarks)
• Address book integration
• Multiple Accounts / unified inbox
• Very low impact on battery life

Fragment-Switcher is an adapter-based, state-saving fragment container similar to a ViewPager.

It was designed with the NavigationDrawer and Tab patterns in mind but can be used anywhere that you switch between fragments and would like to retain instance state.

flixel-gdx is an open source 2D game engine written in Java. Flixel-gdx is a port of AS3 flixel. It is built on top of the powerful libgdx framework which allows developers to build and distribute cross-platform games.