JumuikaSMS is an unofficial simple PHP class integrating with Jumuika's SMS gateway. It is released under BSD(lite) licence, and hence can be used for all commercial purposes. Created by Michael Pedersen of Pluspeople Kenya LTD.
Current system is 100% functional, and can be used in production enviroments.
In order to use the gateway you need to obtain an account from Jumuika http://www.jumuika.co.ke After obtaining credentials for your account you need to enter those into the class.