NEOScavenger Save Manager
I wanted to do something to remove my frustration at only having one "save" slot and having it deleted after death.
Thus, I came up with this rather "hacky" but workable solution, using a batch file (.bat) and a couple of user-configurable settings files to create a sort of "save manager". The fact that it uses/resembles the old DOS command windows actually feels nostalgically fitting given the retro look and style of NEOScavenger, IMO.
A readme is included explaining how to install and set this up, but it's pretty simple.
Note though that the readme was written for the downloadable Beta version of NEOScavenger, played on Windows 7 x64 (though it should in theory work with the Steam version too). The topic here explains how to find the folder needed for the online version and/or for other OS systems like Windows XP, Linux and MacOS.
Also note that while this works perfectly for me, it's not the most user-friendly solution and the ancient DOS-like GUI (this is just a bat file, after all) makes it somewhat easy to accidentally overwrite a save if you don't pay attention. Use at your own risk. Plus, since it's a Windows/DOS batch file, it will quite possibly not run on non-Windows systems (sorry, I have no way to check).
If you feel this is somehow "cheating", here's something to note: running "cleanup" and temp file remover utilities like CCleaner will *wipe* your NEOScavenger save folder, so backing up your save from time to time would be a good idea anyway!
Download NEOScavenger Save Manager V7
Hope Dan doesn't mind me posting this; I made it for personal use, but thought it might come in handy for others who love NEOScavenger but hate "permadeath" in games. ;)
UPDATED TO V4 (March 5th, 2014): Now should "automatically" find your save folders and set itself up.
UPDATED TO V5 (November 10th, 2014): Now automatically keeps your saves and config files in a subfolder of your game's install directory (named "NSM") to minimize clutter. See the included readme file for more info. To continue using saves from a previous version, run Save Manager's "setup" again when prompted and then manually copy your .ini and .sol save files from your NeoScavenger folder to the new NSM subfolder, overwriting as needed.
UPDATED TO V6 (December 23rd, 2014): Fixed bug that prevented auto-detection of game files with newer NeoScavenger versions! Thanks for the heads up, folks! Also added a "wipe data" option in case you reinstall the game in a new location and want to make sure all traces of your old settings and saves are removed to prevent errors and conflicts.
UPDATED TO V7 (December 24th, 2014): Merry Christmas! Options on the main menu are no longer case sensitive (both "a" and "A" will now work).