Open Access Trends and Tools:
Alongside the large-scale initiatives and debates discussed above, there are smaller—but nonetheless important—trends and tools that have emerged in this space.
One of these is the rise of preprint servers or so-called “arXiv clones.” In the last several years, more than a dozen new repositories of this type have emerged, some in fields like sociology (SocArXiv), biology (bioRxiv), and chemistry (ChemRxiv), whose researchers are still new to sharing pre-peer-reviewed work in this way. Most preprint servers and their users have in common the view that this kind of OA sharing will stimulate discussions, improve research, and open up science.
More details are here