Cardio is a library that can play back many different audio files (MP3, FLAC, WV, MOD, etc.). It handles both the input (reading files) and output (writing audio). Cardio is extensible via plugins, many of which are available at the Cardio Web site.
ObjectAL for iPhone is an audio library that provides a simpler Objective-C interface to OpenAL and AVAudioPlayer for iOS developers.
amrnb is a shared library wrapper for the 3GPP Adaptive Multi-Rate Floating-point (AMR) Speech Codec (3GPP TS 26.104).
amrwb is a shared library wrapper for the 3GPP AMR Adaptive Multi-Rate - Wideband (AMR-WB) Speech Codec (3GPP TS 26.204).
A programmable Java monitoring/profiling agent.
A Razer device configuration tool.