libsigrok is a shared C library which provides basic hardware access drivers for logic analyzers, oscilloscopes, MSOs, multimeters, dataloggers, and more. It also provides input/output file format support.
libsigrokdecode is a shared C library that provides (streaming) protocol decoding functionality. The protocol decoders are written in Python (>= 3.0).
A language that adds classes, methods, and other object oriented features to C.
A PDF rendering library.