Save trees, stamps and time by sending ecards rather than printed material via snail mail. There are still moments when we need to take pen in hand but for many occasions, digital greetings are totally appropriate … and appreciated:)

Our roundup of 7 options begins with 2 sassy and classy faves:

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(above) Sassy ecards with attitude @ someecards.com

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(above) Classy beautifully animated e-cards accompanied by soundtracks – Jacquie Lawson.com. Okay, not “free” but really cost effective and super easy to use. Pay a flat annual fee ($12) and send as many cards as often as you like to as many people as you like.

It’s always nice to make a donation, but these nonprofits offer free Nature-inspired ecards:

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(above) World Wildlife Federation has cute Polar and Panda Bear ecards for Mama Bear’s Day

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(above) NatureConservancy offers free ecards with a selection of Mother’s Day themes.

The big boys – Hallmark and American Greetings each offer free ecards.

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(above) American Greetings features versions that are printable, adaptable to Facebook or mobile phones.

And last but not least, Cartoon-style freebies are available at Care2.com.