http://www.jimhensonlegacy.org
Established in 1993, The Jim Henson Legacy was created by family and friends in response to the extraordinary interest in the life and work of Jim Henson. The organization’s website includes a biography, Henson facts (including awards and honors), and a link to the Henson Legacy’s Amazon.com shop.

http://www.henson.com 
The official website of The Jim Henson Company and The Creature Shop includes information on current releases, a history of the company, and biographies of the Henson family http://www.henson.com/company/henson_family.html

http://www.lib.umd.edu/digital/henson
The Jim Henson Works at the University of Maryland is a collection of over 70 digital videos spanning 35 years of Henson’s groundbreaking work in television and film. The video index summarizes each project’s plot and notable highlights groundbreaking elements. However, these full-length videos are only available for viewing at public computer stations in the Michelle Smith Performing Arts Library, McKeldin Library, and Hornbake Library at the University of Maryland.

http://muppet.wikia.com/wiki/Muppet_Wiki
This collaborative encyclopedia written by and for Muppet fans offers a wealth of information on anything and everything related to Jim Henson and the Muppets.

http://www.sesameworkshop.org
The Official Website of Sesame Workshop, producers of Sesame Street, includes lots of great learning games for kids, featuring characters created by Jim Henson, and educational advice for parents. The website also offers information about the television show and related special events.

http://www.muppetcentral.com
This comprehensive website contains information on the latest Muppet happenings, a news articles archive, episode guides, characters descriptions, fan forums, Muppet trivia, and a radio station that plays Muppet music 24 hours a day.

http://muppets.go.com/main.html
Disney’s official Muppet website features Kermit and the rest of The Muppet Show characters in online games and other fun interactives.  Muppets.com includes recent press releases and information about new and upcoming Muppet videos.

http://www.toughpigs.com/
This fan-created blog offers quality commentary on Jim Henson and the Muppets. It also includes script excerpts, summaries, and images from Muppet episodes and films.   

http://www.fragglerocker.com
The unofficial Fraggle Rock includes pictures, music, theme songs, video, mp3's, lyrics, episode guides, games, and the lasted Fraggle Rock news. 

http://lavender.fortunecity.com/tomatoes/
168/darkcrys/index-b.html
The Dark Crystal Unofficial Home page featuring character guides, maps, audio clips, illustrations, fan art, photos, trivia, news articles, and analysis of the Skeksis language.

http://labyrnth.tripod.com/labyrinth/index2.html
The Unofficial Home Page for Labyrinth features in-depth character descriptions, maps, behind-the-scenes photos, trivia, photos, and merchandise information.