Although many TUAW contests are limited to North American participants, here's a contest sponsored by a Belgian Mac development firm that is open to everybody!

Creaceed's Hydra 1.6 software is a Leopard-only solution for creating HDR (High Dynamic Range) photographs. If you're not familiar with HDR photography, it's a way of creating photographs that are closer to what the human eye actually sees (view Flickr gallery). To do this, you take two or more photos of the same scene; some are overexposed, some underexposed, some are just right.

For example, if you see a beautiful sunset with your own eyes, you can see details in both the sunset and the surrounding landscape. Since digital camera CCDs don't have the same dynamic range as your eyes, photos of the sunset usually show the landscape as being too dark. If you get the landscape "right", the sunset is washed out.

Hydra takes those photographs, aligns them, and then performs some algorithmic magic to create HDR images that are perfectly exposed across the entire photograph.

If you got a new digital camera for Christmas, give Hydra a try, and then enter your best HDR images into Creaceed's contest. Entry details can be found here -- good luck!

• An overhauled caching engine to improve import speed and responsiveness
• A "Discards" stack for unwanted image files that provides a direct route to Trash
• A "File stack" feature for moving existing files to a new spot on your hard drive(s)
• Improved memory card download performance
• The ability to save and recall stacks when re-launching the app.

Photon just loaded 839 JPEG image previews for me in under 2 seconds. That's expletive worthy speed. And when it loads the full image, it's just as fast, even with RAW format images. And it loads every pixel of a RAW image. If you set the preview mode to fit-to-screen, clicking the image gives you a loupe-style zoom to full resolution. It reads photos–from folders or directly from cameras/memory cards–with a feature they call "Instant Import". I plugged in a camera and by the time I had looked back at the screen, it had recorded all of the images on the card.

Photon serves one purpose, but serves it well. It helps you do a rough cut of large batches of images before heading into Lightroom or Aperture for more advanced procedures. It lacks any form of image flagging, has limited viewing of metadata fields (the columns in the HUD aren't individually expandable or adjustable) and no search feature of any kind. It basically provides a very fast, very streamlined interface for creating collections ("stacks") of images and–once you've bought the full version–exporting them with options to convert the format to jpg, png, psd and more. It does provide histograms, which is handy for deciding on which RAW images you're planning to keep.

A demo of Photon is available for download, and costs $49 to purchase. That's shown as a markdown from $69, but I'm unsure if that's a limited-time offer.