JChartLib is a library for drawing beautiful charts. It supports linecharts and barcharts with colors, automatic axis numbering, and automatic styling depending on the number of values. Charts can be integrated into Java swing applications. Charts can be saved as jpg or png image files.
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.
jWordConvert is a Java library which can read and render Word documents natively to convert to PDF, to convert to images, or to print the documents automatically. The library is 100% Java, so it can run on any platform which supports Java. It does not use any third party software or native calls, and can be run in a server environment or integrated into a desktop application.
PayPal Payments Pro/Adaptive Payments PHP Class Library includes methods to easily integrate all of PayPal's APIs, including PayPal Payments Pro and Adaptive Payments. It makes it extremely quick and easy to tie PayPal into your applications. It comes with template solution files for nearly every API call available. All you have to do is populate the request parameters, and you'll get a PHP array result which includes everything you'll need from the API call.