Piggydb is an open source Web notebook application that provides you with a platform to build your knowledge personally or collaboratively.

With Piggydb, you can create highly structured content by connecting knowledge fragments to each other to build a network structure, which is more flexible and expressive than a tree structure. Fragments can also be classified using hierarchical tags.

Piggydb does not aim to be an input-and-search database application. It aims to be a platform that encourages you to organize your knowledge continuously to discover new ideas or concepts, and moreover enrich your creativity.

You can explore this "Piggydb Documents" database in various ways, as follows:

The database is continually growing and changing, so please check back often or subscribe to the feed ;-)