LayoutCast is a little tool to help with that, it will cast every changes in your Java source code or resources (including library project) to your phone within 5 sec, and does not restart the hold application.
Thrifty is an implementation of the Apache Thrift software stack for Android.
Thrift is a widely-used cross-language service-definition software stack, with a nifty interface definition language from which to generate types and RPC implementations. Unfortunately for Android devs, the canonical implementation generates very verbose and method-heavy Java code, in a manner that is not very Proguard-friendly.
Android QR Code Decoder and Encoder. This is a port of the ZXing project but reduced in size and scope.