Epistolary
- A comprehensively interlinked web database of the thoughts, experiences and ideas from the lives of two web programmers.
- http://epistolary.org/

UCI Knowledge Discovery in Databases Archive
- An online repository of large datasets which encompasses a wide variety of data types, analysis tasks, and application areas. The primary role of this repository is to serve as a benchmark testbed to enable researchers in knowledge discovery and data min
- http://kdd.ics.uci.edu/