If you havent already, (and i know many and many say this) check the free software list. Not many for DSLR's currently, but there is options. If you'd like something cheap (not necessarily free) there is a software called Boinx iStopmotion for 20$ on Apple computers.
There is a WIP version of the phone app stopmotion studio for windows and mac, and is free. I tried it at first, not the greatest, but it works well. There is a 10$ version for a better experience. (although dont buy it until they have completed the programs works)
I know of a Windows version of Boinx called Stopmotion Eclipse (or something) for around the same price. Would check that out too.
Thats really all I can think of considering free/cheaper, softwares. (I use boinx, since i dont have a portable editor running windows, and some other mods who are more experienced can probably help way more.) Keep on Bricking!
- Your buddy,
StafFilms