"Piggydb is designed to maximize your creativity and help you connect the dots between your ideas. More flexible than a standard database and easier to use than a Wiki, Piggydb gives users the help they need to create truly comprehensive knowledge listings around a particular topic.
...
Piggydb makes it much easier to look at a chunk of information and organize it from a fresh perspective based on any number of variables and schemes. Your imagination is the limit.
...
The personal version is completely self-contained and does not require any kind of web server software. It’s as simple as downloading and installing the software and launching the server. Your default browser will automatically load the Piggydb system." - fiberdownload.com