I want the users of my website to be able to share and spread the word in the same way Asana users do it. The only difference would be that I want the users to be sharing only through their gmail, yahoo and windows live (no need for the other 2 options). If you don't have an account on asana, you'll have to create one in order to see how their share button works. The share button is shown in the attachment image of this project called "[url removed, login to view]". Let me know if you have some questions.
2 freelancers are bidding on average $79 for this job
if you are looking for a share button as you said in detail then i can do this for you please check PMB