Some usefull websites

To check if a port is open:
http://www.canyouseeme.org/ 
To check if a site is down:
http://www.downforeveryoneorjustme.com/ 
A place to get newest exploits:
http://www.exploit-db.com/ 
Lets other people view your inserted text:
http://pastebin.com/ 
The free online crypting + decrypting service:
http://www.crypo.com/ 
An online MD5 decrypter:
http://www.md5decrypter.com/ 
The best online Admin Page Finder:
http://sc0rpion.ir/af/ 
It gives you alternatives for program’s:
http://alternativeto.net 
Upload and send files to friends etc. Very quick:
http://ge.tt/ 
Online WPA cracker:
http://wpa.darkircop.org/