As part of its Educational Outreach Program, Nobelprize.org has created a series of educational games, experiments, and simulations based on Nobel Peace Prize work and Nobel Prize-awarded work in physics, chemistry, medicine, literature, and economics.  In a 10-20 minute activity, students can train Pavlov's dog to drool on command, arrange an amazing laser party for Professor Photon, or test their knowledge of the characters and symbolism in William Golding's Lord of the Flies.  Although designed for students 14-18 years of age, these learning objects would be productive diversions for undergraduates (and professors).  Now, if I could just navigate this parasite to the liver without being killed by a cytotoxic T cell...

From Stephen Wolfram, creator of Mathematica—"the world's most powerful mathematical software system"—comes The Wolfram Demonstrations Project.  The Wolfram Demonstrations Project is an "open-code resource that uses dynamic computation [i.e. Mathematica] to illuminate concepts in science, technology, mathematics, art,  finance, and a remarkable range of other fields.” Although Wolfram's most recent version of his computational software (Mathematica 6) is  required to author, modify, and publish Demonstration source code,  web previews of the Demonstrations are available online.  Alternatively, the free Mathematica Player allows anyone (with or without Mathematica 6) to "download a live version with active controls.”