Boox (Blocks Out Of Xoops) is a module which is to help you to manage content that XOOPS can't access but which is part of your site.
Typically, this content is created on the form of blocks which are not parts of a XOOPS module and that's also a content which is, in general, placed in the theme.
With the module, you can create as many "virtual blocks" as you want, they are saved in files (the module does not use database) and you just need to call them in your theme.
It has now been updated to XOOPS 2.5.x Admin GUI and tested on XOOPS 2.5.5 RC and PHP 5.3.10
Download: XOOPS SVN