External links
Framework for developing Games in Crystal
LibUI based GUI framework for Crystal
Papierkorb's "cute" (event-centric publish/subscribe model) with additions
Readline-esque library with fancy features
The fancyline fork for LoveShell
UI framework based on the Fusion/libui.cr library, with elements from watzon/cru.
JSON-RPC client and server library
A simple Crystal UI framework for terminal interfaces.
A BitTorrent library in pure Crystal