Dungeon Keeper Gold™
Dungeon Keeper™ 2
Theme Hospital
Theme Park
Syndicate Plus™
Syndicate Wars™
Magic Carpet Plus™
Magic Carpet™ 2: The Netherworlds
Populous™
Populous™ 2: Trials of the Olympian Gods
Populous™: The Beginning
valid for the next 20 hours, also quite a few other bundle deals on the homepage
Great games, absolutely love Bullfrog Games.
I play a few on my Android tablet via DosBox.