Khan Academy is not-for-profit with the goal of changing education for the better by providing a free world-class education to anyone anywhere.
Access scientific knowledge, and make your research visible.
Collaborative platform for research. To write and manage technical documents in one place.
Brilliant.org, also known as Brilliant, is a website and associated community that features problems and courses in mathematics, physics, quantitative finance, and computer science.
Monitor's battery capacity through the use of science.
labfolder is an electronic lab notebook that helps to document, organize and share your research data.
Create and manage your own space program, build and fly spacecraft, and try to conquer space.
Lernabit is a note taking app that is focused on helping you remember the things you learn. With other note taking apps, your notes just pile up and get forgotten.
Microsoft Academic Search is an experimental research service developed by Microsoft Research to explore how scholars, scientists, students, and practitioners find academic...
Get instant help understanding your homework. Real humans, no robots 👩🏼.
Spaced-repetition app, the best for scientists and coders.
With rich formatting, with images, with code formatting, with formulas, with multiple flashcard types.
Entirely free, open-source.
Thousands of free ebooks, pre-formatted for reading on your computer, smartphone, iPod, or e-reading device - ePUB, Kindle, eReader, PDF, Plucker, iSilo, Doc, RTF, Mobipocket...
Semantic Scholar (paywall free) is a science publication aggregator that collects citation-data from PubMed, CiteSeer, IEEE etc and rank each article according to the percieved number of impactful citations.
BKChem is a free (as in free software :o) chemical drawing program. It was conceived and written by Beda Kosata and is currently maintained by Reinis Danne.
Foldit is an experimental video game about protein folding, developed as a collaboration between the University of Washington's departments of Computer Science and Engineering...