ImageMagick is a free, open-source software suite for creating, editing, converting, and displaying images. It supports 200+ formats and offers powerful command-line tools and APIs for automation, scripting, and integration across platforms.
minimal cross-platform standalone C headers
The “Quite OK Image Format” for fast, lossless image compression
A lightweight single-header cross-platform library for general windowing
libass is a portable subtitle renderer for the ASS/SSA (Advanced Substation Alpha/Substation Alpha) subtitle format.
- substation-alpha
- libass
- c
- subtitle-formats
GD Graphics Library
Simple, modern libpng alternative