This is a great site for "support" from people. If you're looking for tools (calorie-counting, portion sizes, etc), apps for your smartphone, and other things like that, people on 3FC have found the following useful:
• FitDay
• LoseIt (I use this)
• Daily Plate at LiveStrong.com
• About.com calorie count
And a bunch of others. They're all basically the same thing. Like diet plans, mostly they'll all work if you just pick one