metagloss is an annotation-centric Android library for reducing boilerplate code. Relying on run-time parsing and compile-time code generation, metagloss provides facilities for mapping XML and databases to data objects, dealing with preference screens and working with DB queries.
HC-SR04 Ultrasonic Arduino Library is specifically for the HC-SR04 ultrasonic sensor. It features timing, metric conversion, and standard deviation methods, plus a few support methods. It is written in C++ to conserve the namespace. The conversion formula can be easily modified to optimize the accuracy of conversion at different distances for inches and centimeters. Multiple buffers of different lengths can be created for determining standard deviation.
Aspose.Pdf for Android is a PDF document creation and manipulation component that makes it possible for Android applications to read, write, and manipulate PDF document without using any other third party applications. It supports PDF compression options, table creation and manipulation, graph objects, extended security controls, custom font handling, bookmarks, table of contents, attachments and annotations, PDF form data, printing, and much more.
Perf4CDI is an add-on package for implementations of CDI (Contexts and Dependency Injection for the Java EE platform, also known as JSR-299) providing convenient integration with Perf4j, a performance monitoring library for Java applications. For basic usage, it's enough to annotate the profiling method in CDI-based applications. Many settings can be customized.