flashbake « Bit Bucket Labs
http://bitbucketlabs.net/flashbake/

a seamless source control tool for ordinary people.

cory doctorow's hyper texty tool

"a seamless source control tool for ordinary people"

Using Git to track and version your writing.

how to use git as version control for writers

nice intro to Flashbake

Save snapshots of frequently-updated files over time with programmer-strength version control—but without the learning curve. Free software Flashbake captures working files and adds details like the weather and your Twitter status to each version automatically.

Leonard uses Tiddlywiki for worldcreation; I'd be curious whether any authors are now using Flashbake

Even Cory Doctorow's using Git .)