What are some free sources for hilarious birthday cards?

Someecards and American Greetings both have free e-cards with hilarious birthday options. Both sites allow users to send an e-card to an email address free of charge, although American Greetings only gives a 30-day free trial. Printable options are also available.

For example, one Someecard option reads, "I'm so glad we're going to grow old together and that you'll always have a head start." Another says, "I'm not making any age-related jokes because I genuinely feel bad about hold old you are." American Greetings cards have fun songs, and ones with personalized lyric options. The personalized lyrics allow you to put your friend's name, occupation and some descriptive adjectives in the jingle.