nedit rocks! Unfortunately I do my work almost exclusively in Windows nowadays, and running it in Cygwin feels clunky at best.
What I love and miss most about nedit is the command-line filter: You highlight a few lines, hit Ctrl-R, and enter a shell phrase. The highlighted text becomes the standard input for the command, and is replaced with the command's stdout. Plain and simple. I can then use any and all command-line tools and shell scripts to process my code.
I know vim does this too, but the visual mode feels a tad clunky to me. nedit just made it so easy. I wish more editors supported that feature so elegantly.