Donations to a cause in their name:

Gideon's International - the people who put Bibles in hotel rooms (and many other places) You can donate Bibles in someone's name or memory. *Click donations and go to Memorial Bible Program

http://www.gideons.org/

Habitat for Humanity

https://www.habitat.org/donation/gfth/default.aspx

Samaritan's Purse - click Giving/Help Us and then gift catalog

http://www.samaritanspurse.org/#

World Vision - you can even donate a goat in someone's name
Click the 2005 Gift Catalog


I know there are many more~