Thunderdell and BusySponge
http://reagle.org/joseph/2009/01/thunderdell.html

Would you like a bibliographic system that was a simple and powerful complement to the way you take notes? The Thunderdell scripts are intended to make sure the important task of engaging a text is not hindered by bibliographic constraints. Using the power of the FreeMind (0.7) mindmap application you can quickly tag and outline a source and trivially indicate annotations, paraphrases, and excerpts with simple keyboard shortcuts; you can outline, link to Web resources, and include images and tables — really, anything you can do with a mindmap and HTML. The underlying data is accessible XML and Thunderdell transforms this into the open biblatex bibliographic format (an update to the BibTeX standard). Thunderdell is written in Python and requires some familiarity if only to specify the location of your root mindmap. Their system is an Ubuntu machine, but they believe it could be made to work on any platform as all dependencies (including lxml and httplib2) are cross-platform. The scripts are available at this repository. The command-line BusySponge micro-blogger and Web scraper is also included and can be used to populate your mindmap with bibliographic data about Web resources. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog.