Is there a Construction Kit similar to The Elder Scrolls Construction Kit....................................?

or does one have to use The Elder Scrolls Construction Kit?

I've been wondering this for ages and thing is... although The Elder Scrolls Construction Kit may be fine but... it is only meant for The Elder Scrolls and does not let you create your OWN game (as in making a completely new game with whole new game title, new storyline, different characters and stuff which has nothing to do with The Elder Scrolls games at all) so I was kinda wondering if there was a similar TES: Construction Kit available (and it has to have nothing to do with TES) or not? .__________.

If thereis can someone PLEASE tell me what it's called?

Thank you =D

LittleRedDragon2486