https://torrentfreak.com/spotifys-beta-used-pirate-mp3-files...
Funky quote:
> Rumors that early versions of Spotify used ‘pirate’ MP3s have been floating around the Internet for years. People who had access to the service in the beginning later reported downloading tracks that contained ‘Scene’ labeling, tags, and formats, which are the tell-tale signs that content hadn’t been obtained officially.
And the playstation classic used an opensource ps1 emulator.
There was also some steam game ported from GameCube, and it had the Dolphin Emulator FPS counter in the corner of part of the trailer :D
I also remember reading that 2 of the PCSX2 devs ended up working on the EmotionEngine chip emulator for PS3 consoles with partial software emulation of PS2 (The CECH 02 and later models where they removed the EmotionEngine chip)