libjpeg-turbo is a high-speed version of libjpeg for x86 and x86-64 processors. It uses SIMD instructions (MMX, SSE, SSE2) to accelerate baseline JPEG compression and decompression. libjpeg-turbo is generally 2-4 times as fast as the unmodified version of libjpeg. It also includes a wrapper library for the TurboJPEG API used by VirtualGL and TurboVNC. It was originally based on libjpeg/SIMD but has improved support for Mac OS X, 64-bit platforms, 32-bit and big endian pixel formats (RGBA/BGRA/ABGR/ARGB), accelerated Huffman encoding/decoding, and various other fixes.
libdeco-ostc provides a library for dive decompression calculation. The library functions perform dive simulation using OSTC dive computer firmware and return decompression schedule information. The decompression model used is Buhlmann (ZH-L16C) with Gradient Factors. A C API (libdeco library) and Python API (DecoMecha module) are supported.