Awesome

libs

Single-file public domain libraries for C/C++ (dual licensed under MIT).

• app.h - Small cross-platform base framework for graphical apps, for C/C++.
• assetsys.h - File system abstraction to read from zip-files, for C/C++.
• hashtable.h - Cache efficient hash table implementation for C/C++.
• http.h - Basic HTTP protocol implementation over sockets (no https).
• ini.h - Simple ini-file reader for C/C++.
• rnd.h - Pseudo-random number generators for C/C++.
• strpool.h - Highly efficient string pool for C/C++.
• thread.h - Cross platform threading functions for C/C++.

wip libs

More libs, work-in-progress, some are unfinished, some are complete but lacking documentation.

• array.h - Dynamic array library for C/C++.
• audiosys.h - Sound mixer library for C/C++.
• buffer.h - Memory buffer with read/write operations, for C/C++.
• crtemu.h - Cathode ray tube emulation shader for C/C++.
• cstr.h - String interning and manipulation library for C/C++.
• dialog.h - Loading and management of dialogs for a custom game dialog system.
• dir.h - Directory listing functions for C/C++.
• frametimer.h - Framerate timer functionality, for C/C++.
• id3tag.h - Read/write ID3 tags from/to mp3 files in C/C++.
• img.h - Image processing functions for C/C++.
• mus.h - Parsing library for MUS music files (as used in DOS games).
• paldither.h - Convert true-color image to custom palette, with dither.
• palettize.h - Median-cut palette generation and remapping for C/C++.
• palrle.h - Run-length encoding of palettized bitmaps, for C/C++.
• pixelfont.h - Custom pixel font format builder and renderer.
• sysfont.h - Simple debug text renderer for C/C++.
• testfw.h - Basic test framework for C/C++.

repackaged libs

Single-file header-only versions of libs written by other people, released under the same license as the original lib. I recommend using the latest version of these libs - I only repackage them like this to fit my single-file-libs centered dev paradigm, and if you don't absolutely need that, you are better off using the original multi-file versions.

• ftplib.h - FTP client lib for C/C++. By Thomas Pfau.
• hoedown.h - Markdown to HTML renderer for C/C++. By Porte/Marti/Mendez/Torres.
• libxdiff.h - File Differential Library. By Davide Libenzi.
• lzma.h - LZMA data compression/decompression library. By Igor Pavlov.
• opl.h - OPL3/SB16 emulation with MIDI interface. Based on code by Aaron Giles and Mateusz Viste
• samplerate.h - Sample-rate converter (libsamplerate) for C/C++. By Erik de Castro Lopo
• speech.h - Basic text-to-speech synthesizer for C/C++. By Jari Komppa / Nick Ing-Simmons (et al)