Development of earthlocations.com portal using GIS mapping software and CMS

[Bigvenue]

I am looking for the best GIS and CMS script to build my website earthlocations.com community portal.

Below are some features for earthlocations:

-Detailed Mapping System
-Allow people world wide to add their location maps and post anything e.g activate their business locations and many more
-Locate anything on earth,
-Using cell phones to get live directions
-Live Video Streaming and many more

Please I need your ideas.I registered this domain name in 2003 for the same purpose.