The official microformats site. Contains the development wiki, mailing-list information and scripts to create the major microformats.

Database of file extension information. Supports users comments and submissions. Includes discussion forum.

Database of file extensions, file conversions and software to work with unknown file extensions

Contains detailed descriptions of thousands of file formats and shows the user which products can open them.

A regularly updated filename extension resource site.

Contains information about file extensions.

File extension database. Helps to open unknown file types for inexperienced computer users. A large list of programs to open any file type from the database.

Database of file extensions and detailed information about such file types, including software that can be used to open them.

Source for file format standards, online file conversions, and detailed file specifications, including Unicode characters, MIME types and file extensions.

Database of file extensions with information about each file type.

A searchable filename extension database.

Searchable database of file extensions for data formats, with information and notes on each.

File extensions database.

A comprehensive file format database that provides users with recommended applications for opening specific file formats.

Searchable database of file extensions, explaining what they are used for and which programs they are associated with.

Licensing agent for software for the independent implementation of page description languages. Detailed product catalogs. Links to software sites. Library of news articles