If you've got an account with the Flickr photo-sharing service, be sure to download the free tool. (We're also impressed with the photo-uploading app.)

Macworld's photo experts have assembled a pair of essential collections for as well as .

In case your New Year's resolutions include getting fit, you should look at either or . the former offers a database containing thousands of exercises as well as tools for designing your own customized routines; the latter includes simple graphics and instructions for hundreds of exercises.

We're also impressed with , a great nutrition tracker for logging calories and meals to make sure that you hit all your weight loss goals.