WikiTree is another collaborative family tree site. I like that that there are several levels of privacy which can be set individually for each person in your tree. Gender neutral marriages and parents are allowed. Ancestor Pedigree Chart, Ahnentafel Ancestor List, Family Group View, Descendant List, Wikid Shareable Tree, Family Tree Widgets, and Location Map reports.
There is a duplicate search feature and manual merging of duplicate people.
No source citations for Name, Birth, Marriage, and Death Events. There is no provision for adoptive or foster parents. Events other than name, birth, marriage, and death and Sources and Repositories must be entered in Wiki format. No place list. Despite the Wiki reference in the name this site doesn't have the same look and feel of Wikipedia like WeRelate does. Cannot delete either tree or individual.