ICO libraries for Rust

• ico is a dedicated ICO/CUR crate: it lists every entry, decodes each one to RGBA, reads and writes cursor hotspots, and builds multi-size icons with BMP or PNG entries. Pick it for icon tools.
• image opens ICO like any other format and decodes the largest entry. Its IcoEncoder writes several frames. Pick it when ICO is one of many formats your program handles.

• ico Read and write Windows ICO icons and CUR cursors in Rust with the ico crate: list entries, decode each size to RGBA or PNG, build icons, set hotspots.
• image Read and write Windows ICO icons in Rust with the image crate: open an ICO, convert ICO to PNG, resize a logo into a multi-size favicon.ico with IcoEncoder.