Windows: Notepad++, a light but reliable text editor we included in our 2009 Lifehacker Pack of essential Windows downloads, gets even more reliable with a free, configurable auto-saving plug-in.
AutoSave, one of many Notepad++ plug-ins developed by Franco Stellari, simply adds an option and menu to have Notepad++ save whatever files you’re working on every minute. Through its sub-menu, accessible at the Plug-Ins menu bar list, you can set AutoSave to save only the files you’ve named and already saved, save everything, and specifically save your files whenever you click away from Notepad++ to another app.
That’s all it does, really, but that’s a great feature for a notepad app that’s already convenient as a lightweight, open-source, multi-format editor for people looking to get things done. The developer and commenters note some compatibility issues between AutoSave and certain Notepad++ versions, but it seemed to work fine for me on Notepad++ 5.1.
AutoSave is a free download for Windows systems, requires Notepad++ to use.