I had a bit of time today socializing with Apple friends, and of course iPhone discussions come up. Here are 100 iPhone apps to support their green habits. thanks to Amber Johnson for sending the link.

Here are the top 10.

Top 10

Green iPhone owners have raved for years about how great the following applications are. Based on usability, cost, and effectiveness, these t10 apps are the hands-down best.

Go Green: Displays a tip each time you launch it. Piece of pie.

Green Tips: Displays a tip at launch. Hit the refresh button for more tips.

The Green Lemur: By far the most full-featured of these three. Search, add tips to favorites, or browse by category.

Meter Read: Somewhat manual in usage (but then, no one said saving the planet would be easy), use MeterRead to log your electric meter’s reading. You can log your readings and use them to predict your electrical consumption, and thus, your upcoming bill. Try to be more efficient, and maybe the next time you check the meter, your readings will hit below the projected usage.

greenMeter: Uses the accelerometer to determine the drag and resistance of your car/driving habits in real time. There are several usage meters to monitor, though real-time MPG has been my favorite. Really helps tune your driving for better efficiencies and fewer pointless emissions.

shopgreen: By title, this doesn’t sound like it fits here, but it does. To use the app, just answer some questions about how you maintain your life. Answers that are good for the environment are tallied (like air-drying your clothes, or changing the furnace air filter), and the amount of CO2 you’ve saved is calculated. As a bonus, the CO2 savings gets you discounts at local, participating retailers for your efforts.

3rd Whale: Much like other location-aware shopping apps, 3rdWhale finds you businesses nearby (select walking, biking, or driving distances). So what makes it green? The resulting businesses are supposedly eco-friendly, allowing you to patronize those taking care of the world around us.

Yowza: Yowza presents one of the more interesting ideas of the bunch. Also location aware, it brings up coupons for retailers nearby. So not only could it save you some cash, but it’s claim is that you can use the digital coupon right on your phone’s screen, rather than printing more paper that will just get tossed out.

Green Charging: This application ensures you do not overcharge your phone.

Green Wars: Now you can take on the challenge of earning green while going green. Green Wars is a new take on the classic DOS and TI-83 game Drug/Dope Wars. This simple but enjoyable buy-low-sell-high game can also help you learn a thing or two about how you can save green by going green in your own life.