Continuing the discussion from Internet Archive launches classic game colletion:
Not sure if Rob’s article pointed to the internet arcade (the article is gone because it was a dupe, but I can’t find the article that it was a dupe of…)
The Internet Arcade : Free Software : Download & Streaming : Internet Archive
They have 901 classic arcade games that one can play in your browser.
(they also have a bunch of old PC games Classic PC Games : Free Software : Download & Streaming : Internet Archive)