The ScummVM machine is a program for playing adventure games of old, like Space quest, Maniac mansion and Leisure suit Larry on modern machines. On the website you can also find some great games from the glory days of adventure games, including Beneath a Steel Sky, Flight of the Amazon Queen and Lure of the Temptress. No, it´s not abandonware or warez, but truly free, so take the opportunity to play these awesome titles if you haven´t before, and experience the days when adventure games used to be the shit!
Go to the ScummVM website, download section. First download and install ScummVM, then scroll down to the extra section for the games. Have fun!