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.
liblProc is a library to allow you to get useful information from /proc. The /proc directory contains virtual files that are windows into the current state of the running Linux kernel. It is used to provide information about the system (originally about processes, hence the name). The liblproc library has 167 functions to allow you to get 156 distinctly useful pieces of information from 19 files in /proc. Some functions also process the information to make it more significant.
libmnl is a minimalistic user-space library for Netlink developers. There are a lot of common tasks involved in parsing, validating, and constructing both the Netlink header and TLVs that are repetitive and easy to get wrong. This library aims to provide simple helpers that allow you to re-use code and avoid re-inventing the wheel.