Ui Thumbnail Generator - A simple way to generate thumbnail. For docs and demos.
FileInfo.com - FileInfo is the central file extensions registry and contains a database of over 10,000 file types.
Blog Cover - Cover image generator for your blog post
Convertio - File Conversion in the Cloud
reThumbnail - Boost Youtube Views with Optimized Thumbnails
FILExt - Open, view and convert files online