1) Pegboard - A board with holes so you can hang things on it.
So you can hang IP phones like this:
2) Remote Power Switch - allows you to power on/off device remotely through network.
I got NPS 115 from eBay for about $40. I used it a lot when I'm away from home. So I can practice from office or hotel room.
Please note that this one has 8 outlets and allows you to power on/off devices (routers/switch) individually. Some cheaper ones (like $20) have only one outlet. You have to power everything on or off at once.