Below are links to various adoption resources. Most of these websites fall under multiple categories - agency, photolistings, financial help, and information all in one location. Rainbow Kids is a comprehensive website with tons of info on different aspects of adoption and it's a great place to start.
Books
The Connected Child: Bring hope and healing to your adoptive family by Karyn Purvis, David Cross, and Wendy Sunshine - This book is a must-read for all adopting families!
General Info
Adoption Law - Extensive info on adoption laws and legal issues
Adoption.com - General info on domestic and international adoption
US State Dept. Intercountry Adoption - Comprehensive website about intercountry adoption from the US State Department. Includes information on all countries available for adoption.
Photolistings
Reece's Rainbow - International Down Syndrome Orphan Ministry - photolisting and family sponsorship program; kids available with down syndrome, HIV+, cerebral palsy, and other special needs
Adopt Us Kids - U.S. adoption photolisting and resource center
Financial Help
Check with your employer if they provide Adoption Benefits
Don't forget about the Adoption Tax Credit!
HERE is a long list of financial resources, compiled by Bethany Christian Services
This site has a long list of fundraisers
Just Love Coffee - Set up your own online coffee store; proceeds benefit your adoption
Adoption Bug Tshirts - adoption tshirt sales with some proceeds going to your adoption
Help Us Adopt - Grants for adopting families who have a completed homestudy and who demonstrate a financial need.
Agencies
About a Child
Bethany Christian Services
Holt International
Children's Home Society and Family Services
All God's Children
A Helping Hand