Apps similar to png2linetext include textview, which is free and open source. Other options are Libcaca, hiptext and derasterize. In total there are four apps like png2linetext for Linux, Mac and Windows.
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.
libcaca is a graphics library that outputs text instead of pixels, so that it can work on older video cards or text terminals.
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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.
