Minecraft Client

I am a noobish coder, and I am trying to look for a Minecraft Client for 1.6.2 that will allow me to become another user by entering the server with a different username.

Danka.

Wrong section.. And im sure there are a lot of clients allowing to change the username.. Uhm.. Cant you use the mc cracked too? at the beggining you can change the username to whatever you want.. But ive seen some clients which allow you to change in the server menu GUI so just scan around google