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