QuickBuild is quite useful and flexible CI enterprise solution. It has nice configurations structure which allows to enherit parent configuration with all dependencies.
As for public license you can use QuickBuild software as you wish but there is configurations limit to 16 configurations only. Anyway, it is quite enought for try it.
Let's install it and try to use.
Follow to official site and download binaries according to your distro: http://www.pmease.com/downloads.
Let's install it to /opt dir. QuickBuild needs jdk. Follow to /opt dir, untar source and install jdk:
cd /opt && tar -zxvf quickbuild-5.1.32.tar.gz