I built a new photo editor, Photojam, for the Z10 that got released today. It is built in response to the people who have been waiting for a magical filter app for BlackBerry 10.
The cool thing is that you don't just get the same old filters that everywhere else has. Instead you get a range of effects that you can modify, re-use, and share. You can also make your own effects from scratch. For example, you can save text as an effect and re-apply it with the press of a button to any picture in order to add a watermark.
Please give it a try (it only costs $0.99) and write a review! Let me know what features you want for the next version.
Here are the links: http://photoj.am and Photojam in BB World