These past few months I've been working on a little program called octaPNG, it basically converts any file into a PNG and back. I wrote it mainly for imageboard use so anons can easily share arbitrary files without leaving the thread they're on... For the longest time the program was CLI only, but yesterday I released a GUI version of it using SDL2 and it looks quite /retro/. It was mostly unintentional though.
Since the program is a very basic converter I wanted something simple for the GUI, just some text and a couple of buttons. I figured there's no need to depend on a full blown GUI library (Qt/GTK and friends), I can just open a window and draw the text manually, SDL2 will do... But then I ran into the beast that is text rendering and TTF fonts and decided that that would be too complex, so I resorted to good old bitmap fonts but scaled up to fit 21st century screens. The result was pic related. Someone told me it looks like a C64 program!