| 1. Almost Every File Format in the World |
| Names many file formats and their extensions. |
| http://www.ace.net.nz/tech/TechFileFormat.htm... |
| 2. DaubNET File Format Collection |
| The full specifications of various file formats. |
| http://www.daubnet.com/formats/ |
| 3. Dot What?! |
| Database of file extension information. Supports users comments and submissions. Includes discussion forum. |
| http://www.dotwhat.net/ |
| 4. FILExt |
| Searchable database of file extensions for data formats, with information and notes on each. |
| http://filext.com/ |
| 5. FileInfo.net |
| Database of file extensions with information about each file type. |
| http://www.fileinfo.net/ |
