XTC Abandonware
XTC Abandonware (online since 1997!) is a site where you can download over 1400 games for free.
18 Alternatives To XTC Abandonware
FreeSteamKeys
Free Steam Keys is a popular online platform, gaming community and aggregator powered by Steam fans.
G2A
Enjoy the vast offer of Steam, Origin, Uplay, Battle.net, GOG, PSN and XBOX CD-Keys at the most attractive prices on the market. Don’t overpay – buy cheap on G2A.COM!
Home of the Underdogs
Home of the Underdogs. The database of old games (abandonware).
Humble Bundle
Buy a bundle of games, you decide the price, and support charity in the process.