Limbo is a Content Management System, which allows you to build and mange small dynamic PHP websites very easily. Limbo was inspired from Mambo and offers same overall functionality and usage. Main aim of limbo was to be small, secure, fast and be capable of running off simple text files. BTW limbo is the most powerful text CMS out there.

Limbo Features -

WYSIWYG: Limbo supports full WYSIWYG editing so not HTML required.
Blazingly Fast: Though capable of running from text files limbo is really fast ( .09sec / page in text db and .07 sec /page for MySQL )
Multiple Database: Limbo it truly database independent offering MySQL and text database as choices.
Small footprint: Limbo is quite small and optimized the whole limbo package is smaller than 250 kb (zipped).
Powerful Administration: Limbo offers a very power full administration interface to let you manage content easily.
Multilingual: As limbo is already mambo compatible it can use its language packs.
Loads of themes: You have thousands of mambo templates at your disposal ( 4.5 + ).Easy content publishing: Limbo allows you to easily publish content and news without knowing any HTML.

Core Components -

Link manager: Allows you to put on display links on your site and track them.
News and content publishing: News and content publishing was never so easy.
Polls: Simple Poll where you can take surveys.
File manager: Mange files easily using this module.
Banners: Allows you to put banners " earn some money ".
Newsflash: Show important news items.
Database manger: One click backup and restore of your website.
Contact: users can easily get in touch with you.
Member Ship: Allows you to register members or provide content to specific users only.
Stats: Basic Stats about your website