If you want to build a family tree on your own, you can simply use paper, you can download PAF from familysearch.org, or you have numerous other options such as Ancestry.com.

 

But if you want to collaborate with others while building your family tree, check out some of the below options.

 

Be sure to consider the following when figuring out what service to use:

 

1) The service may cost money (and if it costs money, does everyone have to pay or just one person?)

 

2) The service may require you to set up your own website

 

3) The service may not allow you to store documents or images, or only up to a certain amount

 

4) The service may not allow you store certain info (2^nd marriages or other particular info)

 

5) The service may not be compatible with other software or services you use (e.g., maybe you need something that's GEDCOM compatible)

 

Websites that allow you to collaborate:

Ancestry

Family Pursuit

Geni

Shared Tree

 

Modules to add to your own website:

PhpGedView

The Next Generation

 

Software:

Ancestral Quest

 

I'm sure there are other options (some I chose to ignore on purpose). But feel free to suggest any and maybe I'll add them to the list.