Limb is an OpenSource(LGPL) PHP framework mostly aimed for rapid web application prototyping and development. The current actively developed branch of framework is Limb3(there is also Limb2 but it's not maintained anymore).
Limb3 is not a monolithic framework, it's rather a library which consists of many reusable components distributed as packages on Limb3 PEAR channel. Thus you can cherry pick the components you need and combine them with other frameworks and libraries(e.g. ZendFramework, Symfony, PEAR, etc).
Commercial Use
Modify
Distribute
Place Warranty
Use Patent Claims
Sub-License
Hold Liable
Distribute Original
Disclose Source
Include Copyright
State Changes
Include License
Include Install Instructions
These details are provided for information only. No information here is legal advice and should not be used as such.