'Writer’s Blocks are text blocks you can use to structure your
material. The ‘Blocks’ are designed to behave like the index
cards beloved by generations of writers. You make your notes on the
cards as you do your research and planning. Writer’s Blocks
then helps you develop and organize your material to suit the needs of
your work.' (from our review)
WritersBlocks offer a free trial version, so you can try
it out to see if it is a tool that you would find useful before
buying.
To buy visit their site:
www.writersblocks.com