Overleaf is a cloud-based software for scientific paper writing and research. The online software, according to WriteLaTeX, a company behind the software, is being used by more than 1,000 universities and institutions.

Major features of Overleaf are:

– online collaborative rich text editing
– integrated and streamlined publishing
– editorial and review in the cloud.

You can try the beta version of the software here. You can also get more information about Overleaf by reading this recent interview with a CEO of WriteLaTeX.