While checking DNF, I noticed two of my friends were rapidly changing signatures. I was confused, till I finally figured it out. They're using SignAvatar. Surely, you all haven't got a clue what that is. Well, if I add a few URLs (I'm not sure how many, but a lot.) to a signature or avatar, you can make them all appear at random.
If I wasn't clear, then here's an example. I've used 3 images for the following: http://signavatar.com/23374_v.gif
The images are:
Resting
Testing
Texting
(They will change because I will be changing it for my own personal uses.)
Click the link again, and you will get a different image (At a chance of 2/3). I wasn't sure if a topic was worth it, but maybe some of you will find it useful.
Note: I've tried it on the chatbox and it will not change by each post. If you say something, other pages might see it as the other image.