You may be thinking about Magic Set Editor 2... it's an awesome bit of software I used for my 4E games to manufacture literally hundreds of power cards. Link is here. It's also completely free, again making it awesome.
Personally, I used Tintagel's Power Card templates here, which cost ten bucks, but well worth it for me since they look way better than any other templates out there, imho (bear in mind they are pretty tailor-made for 4E's system of powers though).
Hope this helps :)