[flotillo]

Quite reminiscent of the Teletext 'alpha mosaic' characters, which were 2x3 block graphics characters.

It could be used to make pages like e.g. https://al.robotfuzz.com/~al/teletext/c4/1995-08-26-0046.0/4...

[ocrimgproc]

Any program that can output this?

[flotillo]

Any BBC Micro emulator would do the trick.