FamilyBee was originally a genealogy program for the Google Android Phone. However, the program has since been improved and now runs on all Android-based phones, such as the Droid, Evo, and Backflip. According to the program's web site:
Family Bee is a full-featured robust family tree browser. It allows you to view information about families and individuals stored in GEDCOM genealogy files.You can read more at http://beekeeperlabs.com/android.html
Whether you family is large or small, you can carry it with you on your phone. Your GEDCOM files are stored on your SD card, and the system has been tested to provide solid performance on files up to 12 megabytes (32,000 names). Our reader fully understands the industry standard GEDCOM 5.5 format, and supports all official character encodings: ANSEL, ASCII, UTF-8, and UNICODE.
Family Bee lets you store an unlimited number of trees; supports fast searches over the individuals in the trees; and provides specialized views of families, individuals, "pedigree" trees, and descendents. All facts, events, notes, and sources are at your fingertips.
To purchase it (US $10.00), go directly to the Android Market or scan the attached QR-code with a bar-code scanner. Documentation is available on-line.