All or Nothing - Competitive donations for causes you care about.
Wheelys Dreams - Crowdfunding for making dreams become real
Creddon - Tweet for a cause and a sponsor will donate $1 to charity
Klava Fund - Crowd funding for personal matters or grand causes
eSolidar - Charity shops and online auctions to support great causes
Public Design Vault - 500+ design tools for public good, all in one place