Garthanos
Arcadian Knight
Ditto monsters statblocks. There's a reason when Goodman Games released its first 4e adventure the monsters looks different, because it was published before the GSL came into effect.
Now, WotC hasn't come after people making their own powers. And knowing this hasn't stopped me making my own powers. But I know that all could go away the moment someone at WotC changes their policy faster than you can cay "Ema's Character Sheets".
There is a software I have used which allows one to specify ones own style sheets for powers when you export them to html. blink.. I have a different look -- site wide css sheets could be applied according to users tastes. In effect those elements you are identifying as trade dress are made flexible (one of the choices might be totally color flexible so for use purposes the user can see green at-wills and so on) those choices could be saved in a cookie. The default wouldnt need to be very like that WOTC published product but users can experience it identically if they want.
Even language use could with a bit of php be flexible ... The generalized for Powers could be output called well a Feat. In myth and legend all magic spells are pretty much ritualistic and by and large are rarely performed quickly doing so is a stunt or arcane Feat). But by selection or setting a preference the language refers to powers.
I have actually considered what I would do if I put up a site which allowed users to submit there own powers... the main problem is that I wouldnt want to try and police copyright infringement.