FileProInfo.com is the file information database of over 15,000+ file types, software, free online apps/tools, so tools, guest blogs, videos, and images.
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SMF – Search my Files - SMF - Search my Files v13 is the fastest duplicate files finder and a multi-dimensional - file searcher, - file copier / mover, - file deleter / eraser, - and
Convertio - File Conversion in the Cloud
Multi String Replacer - Replace multiple strings at once!
File-Extensions.org - Large computer file extension library with detailed explanation of each file type with links to download free or associated software programs.
PowerGREP - Quickly search through large numbers of files on your PC or network using powerful text patterns to find exactly the information you want. Search and replace with plain text or regular expressions to maintain web sites, source code, reports, ...
FILExt - Open, view and convert files online