Crossref - Crossref makes research outputs easy to find, cite, link, assess, and reuse. We’re a not-for-profit membership organization that exists to make scholarly communications better.
Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Academia.edu - Academia is a website where you can share papers that are written with other users. You can use a Google or Facebook account to sign in to the website.
Cabri Express - Cabri Express is an all-in-one math toolkit that facilitates the teaching and learning of mathematics from hight school to university
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Google for Education - Google for Education takes the cast analytical knowledge of Google and transforms it into a platform that educators can use to better communicate with their students in innovative ways.