Xenon is a file manager with locally stored file extensions. This is a complete rewrite of Xenon in AutoIt (the second rewrite actually). It should work on most computers now. The assoc.ini file has the icons and file associations. There are no default portable applications set to open files but there are lines commented out that enable most files to be launched.
Edit: Pre-Release 3 adds many features including copy+paste, a context menu, and plugin system.
Edit: Pre-Release 4 includes a zip extraction program based on 7-Zip for n00bs called 6-Zip and plugin examples and installers.
Edit: Pre-Release 5 fixes some bugs in the plugin system and some plugins. Settings are also added.
Edit: Pre-Release 6 adds muti-language features. If you can translate then please post translated lang_ll_LL.ini files. Also added was a new menu with a list of filetypes.
To install a plugin just run an executable in /App/xenon/plugins/.