AbandonGames:Offers a search engine for classic games and an active forum.
Abandonwarez: The pros outweigh the cons: Article on abandonware from The Adventure Collective.
Dan's 20th Century Abandonware: Application software from a time not quite forgotten.
Free Oldies: Search engine covering many sites. Search by name or sort by genre.
The Abandonware Ring: The original Abandonware Ring. With a FAQ and a resources section.
The Ultimate Oldgames Linkpage: A large ring with many sites and a resources section.
Warez, Abandonware, and the Software Industry: An article looking at the issues involved in abandonware from both sides.