To what extent will they work?
My IDE (CodeBlocks) has just eaten my 4000+ line C file, reducing it to absolutely nothing (officially 0 bytes). From what I've heard on the subject, deleting a file from the FS is manageable for undelete utilities, however if you write all zeroes to the file, the chance of retreiving it is slim to none. Since this is essentially what happened in my case, I'm thinking my prospects are very slim here. I've already tried ntfsundelete.com, which seemed proficient at finding and undeleting every other file, including files I had deleted years ago, except the file in question.
So is it worth it to spend the money on another utility, or do they essentially all yield the same results? What is the prognosis for my situation here?