Maian Greetings is a free E-card system. E-card systems are quite popular, so hope you find this useful.

Features of Maian Greetings:
- Nice clean interface
- Utilises MySQL database for efficiency
- Member login system (login required to send cards)
- Flash support
- BB Code
- Search engine
- Auto thumbnail creation (GD2) or upload your own thumbnail
- Categories & sub-categories
- Add icons for categories
- Database prefix for people with only 1 database
- Emoticons (Optional)
- Poems (Optional)
- Midi|MP3 music files (Optional)
- Add comments about images (Optional)
- Event calendar (Optional)
- Mailing list (Optional)
- Favourite images (Optional)
- Random or default stamps
- Advanced date send (Optional)
- User uploads (Optional)
- Restrict comments to specifed length (Optional)
- Supports Mod_Rewrite for search engine friendly URLs
- Set up cron jobs to delete e-cards, send e-cards & delete inactive accounts
- Guests - Can send e-cards from selected categories or sub categories.
- Members - Option to upload own images
- Members - Address book
- much more...

Requirements:
- PHP 4.3 or Higher
- MySQL database
- GD2 Image Library for auto thumbnail creation.