Some visualzation stuff, a specialized feed reader app for comics and a web service translating ISBNs:
Visual Literacy: An E-Learning Tutorial on Visualization for Communication, Engineering and Business
This e-learning site focuses on a critical, but often neglected skill for business, communication, and engineering students, namely visual literacy, or the ability to evaluate, apply, or create conceptual visual representations.
Comictastic: Comic Viewing Like Crazy
Comictastic automatically grabs your favorite comics from the web, giving you unprecedented comic reading efficiency.
WorldCat Web service: xISBN [OCLC – WorldCat Affiliate tools]: API
Use this Web service to retrieve a list of International Standard Book Numbers (ISBNs) associated with a submitted ISBN, based on WorldCat information. Free and subscription versions are available.