If you're doing DIY projects for your wedding, such as invitations, thank you cards, place cards, and the like, then the Font Squirrel will surely be a big help to you.
Font Squirrel is a site that offers free font downloads for commercial use. It has loads of fonts ranging from sans serifs to calligraphy. It also has some dingbats, decorative fonts that can be used as images.
There are some fonts there you could use on your wedding projects. The ever-famous Scriptina is on the list, but you could also use Beautiful ES (which hubby used for our DIY invitation), Chopin Script, or Windsong. Dingbats like IM Fell Flowers and Kfon are great decorations for your cards as well.
I tried to make a mock-up of a monogram using the downloaded fonts in Font Squirrel. It was a quick one, so I didn't get to change the colors. I used Renaissance as the font for the initials, and Kfon (birds) and Nymphette (curls) as decorations:
If you want to have free fonts you could use for your DIY wedding projects, you can visit the Font Squirrel website.