There are 2 repositories under texture-compression topic.
Tool suite for Texture and 3D Model Compression, Optimization and Analysis using CPUs, GPUs and APUs
HDR, PFM, DDS, KTX, EXR, PNG, JPG, BMP image viewer and manipulator
CLI tool for texture compression using ASTC, ETC, PVRTC and S3TC in a KTX container.
Goofy - Realtime DXT1/ETC1 encoder
A Paint.NET filetype plugin that adds support for some of the DDS formats introduced in DirectX 10 and later.
How to do DXT/BCn texture compression in Unity using compute shaders
Texture compression library and tool.
Fast, high-quality texture compression library for many formats
real time ASTC texture compression by computer shader
An attempt to port BC7E texture compressor to a GPU compute shader
A CPU-based DDS encoder optimized for fast batch conversions with high encoding quality.
Hardware texture Compression via OpenGL
Gradle plugin for the Mali Texture Compression Tool