Pika CMS Opensourced
I'm always happy when a popular piece of software goes open source, and thus I am happy to be able to tell you that Pika CMS is freely available under an open source licence as The Open Case Management Project(OCM). Over on the OCM GitHub page you can find all the files and instruction you need to set up your own online browser based CMS.
And of course for those for whom it isn't practical to run your own server you can always go to pikasoftware.com and let the folks over there do the heavy lifting. Now that the software is open source hopefully there will be some community involvement that raises the quality for everyone.