Ebay
The premiere online auction site, many Filmation videos, animated cels, and merchandise can be found here.
Filmation Archives
Great site for purchasing Filmation cels and videos.
Jim's Unofficial Filmation Home Page
A tribute to some of late 70s Filmation shows, including Tarzan and the various Super 7 segments.
Lou Scheimer Productions
Official site for Filmation founder, Lou Scheimer.
70s Live Action Kid Vid
Tribute to live action Saturday morning programming of the 70s, including Jason of Star Command.
Toonarific
Cartoon super site with a wealth of images.
Toontracker
Another cartoon super site, with tons of photos and audio/video clips.
Yesterdayland
Pop culture super site with a focus on Saturday morning programming.