Awesome

L. Spiro Engine

An incomplete game engine with tons of useful code.

Supports:

• Direct 3D 9
• Direct 3D 11
• OpenGl 3.2
• OpenGL 4.4
• OpenGL ES 2.0

Partial support for:

• Vulkan
• Metal

Platforms:

• 32-bit
• 64-bit

Highly modular design makes it easy to browse and understand.

LSDxt

Includes LSDxt, a super-fast full-featured image-conversion tool used by:

• Apple Inc.
• Square Enix Co., Ltd.
• Cisco Systems, Inc.
• tri-Ace, Inc.
• Deep Silver Dambuster Studios Ltd.

Supports conversions to and from:

• DXT 1-5
• BC4U, BC4S, BC5U, BC5S, BC6H, BC7U
• All ETC formats.
• All PVRTC formats.
• All 2-D ASTC formats.
• All packed formats, including R3G3B2, RGB4, RGB5, RGB65, RGB10, RGB12, RGBA2, RGBA4, RGBA12, RGB A1, RGB10 A2, RGB10 A2UI, R11F G11F B10F, and RGB9 E5.
• All alpha formats, including A4, A8, A8 SNORM, A8 UI, A8 I, A12, A16, A16 SNORM, A16 UI, A16 I, A16 F, A32 UI, A32 I, and A32 F.
• All luminance formats, including L4, L8, L8 SNORM, SL8, L8 UI, L8 I, L12, L16, L16 SNORM, L16 UI, L16 I, L16 F, L32 UI, L32 I, and L32 F.
• All luminance/alpha formats.
• All intensity formats.
• All standard 8-bit, 16-bit, and 32-bit formats, including all SNORM, UI, I, and sRGN variants.
• All depth/stencil formats, including D16, D24, D32, D32F, S1, S4, S8, S16, D24S8, and D32FS8.

Loads at least the following image formats:

• BMP
• DDS
• EXR
• GIF
• HDR
• ICO
• IFF
• JNG
• JPEG/JIF
• JPEG-2000
• JPEG-XR
• KOALA
• Kodak PhotoCD files
• KTX
• MNG
• PCX
• PBM/PGM/PPM
• PFM
• PNG
• Macintosh PICT files
• QOI
• RAW camera files
• Sun RAS files
• SGI
• TARGA files (TGA)
• TIFF
• WBMP
• WebP files
• XBM
• XPM