Rapyd was a small set of PHP classes made to build applications/cms/backends using the CRUD pattern. It has been created in 2001 and rebuilt every two year since 2012.
Alternatively it was "stand-alone" framework, "library" or "sub-framework"
The latest version "before" current Laravel Package was a decent stand alone mvc, discontinued after I was fascinated by laravel and all his stuffs. It can be found here
Most of these years I've used rapyd with CodeIgniter
In the end this is a download page on google code (many rapyd versions.. really old, just r.i.p.)