FamilySearch.org is described as 'FamilySearch is a genealogy organization operated by The Church of Jesus Christ of Latter-day Saints. FamilySearch maintains a collection of records, resources, and services designed to help people learn more about their family history' and is an app in the Home & Family category. There are more than 25 alternatives to FamilySearch.org for a variety of platforms, including Windows, Online / Web-based, Mac, Linux and Android. The best alternative is Gramps, which is both free and Open Source. Other great apps like FamilySearch.org are WikiTree.com (Free), MyHeritage (Freemium), webtrees (Free, Open Source) and Ancestry (Freemium).
The WikiTree community is growing a free worldwide family tree. The site is 100% free. There are no premium memberships. All content is contributed by the users and you can keep copyrights. You can also keep modern profiles private or even hidden altogether.
MyHeritage is a family-oriented social network service and genealogy website. It allows members to create their own family websites, share pictures and videos, organize family events,create family trees, and search for ancestors.
Webtrees is a free, open source, website based, collaborative genealogy application. It works with standard GEDCOM files and is installed on a web server using PHP and MySQL (or Postgres, SQL Server, or SQLite).
My Family Tree is a genealogy product for all keen family historians. Its modern user interface and wide range of features will help you create your family tree in no time at all. Features Interactive and customisable family tree chart viewer.
Ahnenblatt is genealogy software for Windows. (Use Portable Version for Linux with Wine) Designed to manage your genealogy data and to generate reports and graphical trees. Many import and export features make it easy to share data with others (GEDCOM, HTML, and more).