How to send online birthday cards? It's easy; Care2 has many free ecards -- the best greeting cards, e-cards, and funny birthday cards on the Internet. Select a birthday card, personalize it with music and a message, and send cards to all your friends. All of our egreetings are one of a kind, most are flash animated, and all will delight your husband, wife, family, friends or any other loved one. And for every greeting card sent, care2 donates to help protect one square foot of rain forest.