1:Triger_Recharge, it will act like switch when it is activated in first time it will trigger other enities normally but after it triggered it the Trigger_Recharge can't be used again like Trigger_Once but only for a certain ammount of time, after that time has passed the trigger can be used again.
2:Trigger_Command, this entity will trigger other entities only if a certain command has been entered in console, could be useful for example for admins who wants to control their map.