By now, you've probably heard about Drobo. It's the ultimate RAID-like array, with USB and Firewire 800 connections, that allows you to store up to 6 terabytes using 4 hard drives (you get about 4.1 TB of usable space, since some of the room is used for RAID redundancy -- see the Drobolator capacity calculator for the details). Not too long ago they released DroboShare, a way to turn Drobo into a NAS (network attached storage device) with Gigabit Ethernet. If you have both a Drobo and DroboShare, you can now run DroboApps.
Because Drobo is built on a small version of the Linux open source OS, you are able to run these lightweight applications that can do some awesome things. There are currently around 20 applications that can create an iTunes media server (Firefly), or limit the total size of a Time Machine backup (Time Tamer), among other functions.
If you're a Drobo owner, you might want to check out these cool new applications. And if you're a developer, why not take a look at the Drobo development SDK?