Are there any sites similar or better than www.dumpalink.com?

If you mean sites with various little random, fun links then - Yes. There's 101 of them out there! Start with:

http://www.digg.com
http://www.shoutwire.com
http://www.compfused.com

I'm sure more will be pointed out

Check out EbaumsWorld

Cool, are there anymore where people post various stuff?

bored.com worth a look

Been there before, not bad.ebaumsworld was already one of my favs, digg is quite good too.