Yet another free network tool
Several years ago, there was a really cool project called ZipTie. The focus of the project was to develop a free network utility that could backup network device configurations and store multiple revisions using as much storage as was available, kind of like CiscoWorks, but better in that it will actually work. I downloaded multiple beta versions and got it working in my environment through many trials and tribulations..
The project was run by a group of guys that were apparently working at or for Alterpoint because as soon as the tool became a stable, awesome product, the ZipTie webpage and forums disappeared and simply redirected everyone to a page at Alterpoint. Luckily they kept the tool free and it is available for download in multiple operating systems and even a VM image.
Granted, it doesn't do everything that Nedi does, but what it does do, it does really, really well - and that's backup all the configurations on all of your network gear as often as you tell it to, with a cool looking user interface.