One of the most interesting folder on Funet archive is mirror of Simtel[0] FTP-serever[1]: there are a lot of very interesting software for various old platforms.

Especially interesting — there are some very cool CAD, GIS and graphics apps or MS-DOS, Windows (from 3.1 to XP).[2]

[0] https://en.wikipedia.org/wiki/Simtel

[1] ftp://ftp.funet.fi/pub/Archived/simtel.net/pub/simtelnet/

[2] https://twitter.com/app4soft/status/1240002398577397772