In support of this year’s Earth Day, the folks over at Top Ten Reviews have reviewed a number of environmentally friendly apps for the iPhone, including iNewz Green, another ourLivez product like Vertography, and are also giving away free copies of the app to some of their readers.

ourLivez will also be giving away some free copies of iNewz Green for Earth Day – follow them on Twitter and watch for promo codes to be released throughout the day.

Amazon Green, a new store from Amazon, focuses on listing environmentally friendly products. Included already are eco-friendly cleaning products, EnergyStar approved lighting products and office electronics.

Currently, they’re also asking customers for their Green 3 products: the three green products that they wish everybody had. The current top three are reusable shopping bags and a couple of different CFL bulbs (fourth is a push reel lawn mower).

Three billion people living in developing nations, about 42% of the population, are under the age of 15. The Green Wi-Fi project has the goal of bringing internet access to these children, and doing it in a way that makes sense for a developing country.

Unlike developed nations, many of the places where this technology was designed to be deployed lack electricity, so the Green Wi-Fi project designed a self-contained unit consisting of a solar panel, charge controller and battery for power, and a modified Linksys WRT54GL wireless router with a high gain external omni-directional antenna for the internet access part. These boxes form the nodes of a self-healing mesh network. Connect one or more of them to the internet somehow (often via a cellular modem) and you can share that connection across the entire mesh. Since the boxes need no external power, they can be placed on rooftops anywhere to build up the mesh.

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Here’s a cool idea for those who use internet search regularly (and we all do, don’t we?). Switch to Ecocho. For every 1000 searches performed, these guys, based in Sydney, Australia, will plant two trees.

The search results are from Yahoo, so you know you’ll be getting high quality results still, but you’ll also be helping the environment. According to their site, they’ll be able to remove 1 ton of CO2 for every 1000 searches performed, and the whole thing is audited by KPMG.

That’s a really simple way that everybody can help make a difference. And all you need to do is change that little search box in the top right corner of your browser to use ecocho.com instead of your current search engine.