durdraw.org
Durdraw is an open source ASCII, ANSI and Unicode art text editor for UNIX-like systems such as Linux and macOS. It runs in modern UTF-8 terminals and supports frame animation, 256 and 16 color modes, mouse drawing, CP437 and Unicode conversion and custom themes. It also includes Durfetch, an animated system information tool, and Durview, an ANSI art pack viewer.