EncFS is an encrypted pass-through filesystem which runs in userspace on Linux (using the FUSE kernel module). Similar in design to CFS and other pass-through filesystems, all data is encrypted and stored in the underlying filesystem. Unlike loopback filesystems, there is no predetermined or pre-allocated filesystem size.
SecureCam is a video surveillance system with a nice GUI. It supports multiple camera and video file inputs. It detects motion in input video using fast algorithms. Alarm notification is provided by email, alarm sound, and video recording. Currently, only a Windows installer is provided, but the source can be compiled on Linux.
QuintoLabs Content Security is an ICAP server/URL rewriter that integrates with your Squid Proxy Server to provides rich content filtering functionality, sanitizing Internet traffic passing into internal enterprise networks. It may be used to block illegal or potentially malicious file downloads, remove annoying advertisements, prevent access to various categories of Web sites, and block resources with explicit content.