How to convert an Electrum 12 word seed to a private key? How can I convert an Electrum 12 word seed to a private key?

I heard Electrum has a special type of algorithm where the 12 word seed can't be used on other wallet software; is that true?
Haven't seen a tool, that can do so. 
Electrum has a BIP39 based system, with some custom extension. Look for BIP39 and Electrum, this appeared already in bitcoin stackexchange. From (somewhere) there I also got the compatibility list:


  https://onedrive.live.com/view.aspx?resid=584F122BA17116EE!313&amp;app=Excel


Internally in Electrum wallet, you can export via menu "Wallet" -> "PrivKeys" -> "Export".