Soapbox Monday: Tell us about your fave green apps

Green apps, anyone?

We want to hear about your favorites. Please tell us about them in the "comments" section below.

This morning's GreenSpace column is about two winners in the U.S. Environmental Protection Agency's green apps contest.

The Light Bulb Finder, developed by Eco Hatchery, a sustainability technology company, helps people find efficient replacements for their incandescent bulbs.

Hootroot, developed by Brighter Planet, a provider of carbon and energy calculations, helps people see the difference in the CO2 footprint among driving, walking, bicycling, taking public transportation or flying between two points.

The contest attracted 38 competitors. But any number of other green apps exist.

Here are some favorites identified by Treehugger, Planet Green, Mother Nature Network and others:

iGrowIt: Explains which veggies grow best in your area and when to plant them. Recipes, too.

EcoDice: A game where you spin a set of dice and then get an eco-friendly task to do.

greenMETER: Tracks your vehicle's fuel and power efficiency. A similar one: Green Gas Saver.

Carticipate: Helps users find people who want to share rides.

GoodGuide: Identifies greenwashing and ranks everyday products for greenness

Green Genie: Identifies more than 100 green projects to take on.

Green Charging: Tells you when your phone is charged so you can unplug it. (The phone vibrates and sounds an alarm.)

Solar Panel Advisor: does various solar computations so you can see if panels are right for you.

iBooks: Reading without paper.

Craigslist app: Helps you find second-hand stuff in your area.

Seafood Watch: Monterey Bay Aquarium app that helps you pick sustainably harvested seafood.

And if nature-oriented apps count, here are some of my favorites:

Leafsnap: Helps with tree identification.

iBird: Helps with bird identification. Includes bird sounds.

Star walk: Keeps you abreast of what's going on overhead.