Design Social Media Software Application

Need to create a web based software that lets people manage their social media accounts and campaigns while scouring the net for relevant content to be included in their posts. I need to build a software comparable to [login to view URL] or [login to view URL] The software will need to do the following: *Web based. *Allow users to manage several different social media accounts simultaneously (Facebook, Twitter, Google+ and Facebook pages) *Include a content calendar (this will allow users to create a calendar of future posts) *Allow users to schedule Social Media posts in advance. *Analytics to measure the traction of past posts. *Needs to have the ability to spider the web based on keywords and phrases and produce relevant content based on search criteria. *Based on "most popular posts" software will search the web for content that is the same and produce it for the user in search results. *Use Twitter API *Use Facebook's API