Ancestry

Ancestry.com was founded as the publishing company The Generations Network in 1983. The company is now the largest for-profit genealogy company in the world and runs a network of genealogy and family-related websites.

Reasons for using Ancestry's personal tree feature:
 * No-one can change your personal tree
 * Trees generate hints for sources, stories, photos, and media
 * Ancestry.com has unique data search engine
 * Ancestry.com helps you find relatives who also have trees, photos, sources, and stories about your ancestors
 * Your personal tree allows you to transfer data between Ancestry.com and FamilySearch Trees"