Half-Life Texture Tools
(January 5, 2018)
Half-Life Texture Tools is an application for editing GoldSrc sprites and WAD3 files. Textures can be extracted or batch extracted from WADs and BSPs in any modern format, including PNG, JPG, BMP, and GIF. It can also do minor editing of textures already available in a WAD, including rotation and editing the texture's palette.
For sprites, Half-Life Texture Tools can view existing ones and create entirely new ones that can be locked to any orientation and using any render mode, including additive (commonly used for HUD elements) and alpha-tested (commonly used for sprites found in the world).
Half-Life Texture Tools requires the .NET Framework 3.5 and above to run.