HashPipe is a file sharing network that uses HTTP or HTTPS for all communication and references downloads by their MD5 hash only. Works on any system with PHP5 and a compatible webserver and database. For Windows XP there is now an easy server bundle.
Argo-Panoptes is a distributed surveillance system that allows video remote control using a smartphone or web browser as user interface. The system is able to alert the user about failures or motion detection by email, SMS or MMS.