Most commonly used file types in Photoshop - PhotoshopCAFE
Photoshop Source File - Artwork Hard Copy On Layers
GitHub - TheNicker/libpsd: Libpsd is the Photoshop file format decode library in C language with full source code. It mainly decodes and blends *.psd files. It supports for Adobe Photoshop CS version,
Source files for Photoshop for Beginners YouTube tutorial - Envato Forums
How to save PSD file or Source file photoshop - YouTube