Libcaca is described as 'libcaca is a graphics library that outputs text instead of pixels, so that it can work on older video cards or text terminals' and is an app in the Video & Movies category. There are four alternatives to Libcaca for Linux. The best alternative is png2linetext, which is both free and Open Source. Other great apps like Libcaca are derasterize (Free), textview (Free, Open Source) and hiptext (Free, Open Source).
derasterize converts pictures into Unicode text with Ansi colors for display within a terminal. It performs lots of AVX2 optimized math to deliver the best quality on modern terminals with 24-bit color support, e.g. Kitty, Gnome Terminal, CMD.EXE, mintty, mlterm, etc.
Quickly view (satellite) imagery directly in your terminal using Unicode 9.0 characters and true color. textview is a small tool to quickly view high-resolution multi-band imagery directly in your terminal.