Last week we saw how to install Sparkleshare in Ubuntu from a PPA. As a reminder:
Sparkleshare is a tool to synchronize your files in the cloud - like Dropbox or SpiderOak - but unlike these, Sparkleshare is open source and allows you to use your own server. Sparkleshare uses GIT so if you delete/modify some files by accident, you can easily revert the changes.
Tonido is an extensible personal web application platform (I guess you could call it a "home server" or your own personal 'cloud'), that offers an set of rich and powerful browser based applications. The files are hosted on your computer and you (or somebody else if you allow it) can access them remotely, through these web apps.