This week: TightVNC
If you're anything like me, you have multiple computers doing various tasks for your household. A few run headless(without a monitor) or even without a keyboard or mouse hooked up.
I have found that Windows RDP isn't the answer for me as the OS variation is too great. FreeBSD, Mac OSX, Windows, and Linux are all running on my network. An easy way to get to these systems is to use TightVNC. I use this exclusively for LAN access. You can set up port forwarding as well as SSH tunneling to access devices via the internet, but I have found LogMeIn solutions work great for that.
Setting it up is easy and it is free! There are a many variations of VNC technology, but I have found TightVNC to be the most trouble-free for me thus far.