Google's mission is to organize the world's information and make it universally accessible and useful.

Online collaborative writing, citing, hosting of data and publishing.

Annotate the web, with anyone, anywhere.

Public search engine and digital library for scientific and academic papers.

A free, all-in-one online software platform for DNA design.

An open citations index for scientific publications.

Scientific platform to research and curate the entire corpus of phenomenology.

Perma.cc is simple, easy to use, and is built and supported by libraries.

Papers helps you collect and curate your research material.

An easy and intuitive way to discover, read, annotate, write and share scientific research.