Suggestion for the 'what editor' post:

Notepad++ (link , free)

And slightly off-topic, an alternative/replacement for good old windiff with a very handy shell extension:
WinMerge (link, free)

Even more off-topic, a tool (shareware) that is worth it's weight in gold if you need to do block search and replacements:
Search and Replace (link)

Perhaps these are of use to anyone.