Well you clearly run your minecraft on forge and modloader and have a few mods. You should go into %appdata% and take out every mod and place one each in your mods folder to see if there running correctly to see which mod crashes your game. If you find out no mods are the source I don't know what I could tell you. Oh and if you come across the mod that is creating the problem either don't use that mod or reinstall it to see if it won't cause minecraft to crash anymore.
My server has different commands about economy. Though I have been planning on turning it into a free build server. I have plugins like account balance, how much an item is worth, and other plugins. I have been thimkimg about changing my server type though to something different. Also my server uses craftbukkit, and it does not have a whitelist.