Family Bee is an industrial strength family tree viewer. It allows viewing of all details for individuals and families in GEDCOM genealogy files. View all individuals, family information, individual bio information, pedigree trees, descendant lists, notes, etc.
Lets you annotate your tree with on-site notes, including photos (graves, primary docs, etc.), and send them to your home machine via GMail.
The App is fast, robust, and complete. It has been tested on files up to 20MB (65,000 names).
This trial version is fully functional. However, it is time-limited to two weeks use. The full version is available for $10. (Find it on the Market by scrolling down to "View more applications".)