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is the most comprehensive scientific research tool on the web. With over 370 million scientific items indexed at last count, it allows researchers to search for not only journal content but also scientists' homepages, courseware, pre-print server material, patents and institutional repository and website information.

HTML5 scientific graphing calculator, which millions of students around the world use for free. We also create activities on top of that calculator, helping students use a powerful tool to experience all the curiosity, beauty, and sense that math has to offer. Those activities were used so often by so many teachers around the world that we decided to create an Activity Builder, helping every teacher create digital math activities that equal and exceed the activities we create ourselves. E-LEARNING: We invite students to solve challenging problems using the tools they already have. We create a need for new tools before we help students learn how to use them.

Utopia Documents brings a fresh new perspective to reading the scientific literature, combining the convenience and reliability of the PDF with the flexibility and power of the web. Free for Linux, Mac and Windows.

combination of a spreadsheet and a scientific calculator. Support for arithmetic, trigonometric, and statistical functions

Google Earth Engine brings together the world's satellite imagery-trillions of scientific measurements dating back more than 25 years-and makes it available online with tools for scientists, independent researchers, and nations to mine this massive warehouse of data to detect changes, map trends and quantify differences on the earth's surface

ResearchGate is the professional network for scientists Over 900,000 scientists from 192 countries have already joined.

En-ROADS is a global climate simulator that allows users to explore the impact of roughly 30 policies-such as electrifying transport, pricing carbon, and improving agricultural practices-on hundreds of factors like energy prices, temperature, air quality, and sea level rise. In 2009, Climate Interactive was the first scientific team to add up all the climate pledges countries had made to the United Nations leading up to the COP 15 Copenhagen climate negotiations. This analysis, which became known as the Climate Scoreboard, landed our work in the New York Times and in the meeting rooms of the world's top decision-makers over the next several years.

This visualisation generates itself from this Google Doc. So when new research comes out, we can quickly update the data and regenerate the image. (How cool is that??) Hopefully then this should be a useful web resources for years to come. About the imageThis image is a "balloon race". The higher a bubble, the greater the evidence for its effectiveness. But the supplements are only effective for the conditions listed inside the bubble. You might also see multiple bubbles for certain supps. These is because some supps affect a range of conditions, but the evidence quality varies from condition to condition. For example, there's strong evidence that Green Tea is good for cholesterol levels. But evidence for its anti-cancer effects is conflicting. In these cases, we give a supp another bubble.

Welcome to the online chart builder. With your free account from ChartGizmo you can now create charts for your website, blog and social network profiles. ChartGizmo may be useful for those who need to visualize financial, scientific or other type of data.

Anki is a program which makes remembering things easy. Anyone who needs to remember things in their daily life can benefit from Anki. Since it is content-agnostic and supports images, audio, videos and scientific markup (via LaTeX), the possibilities are endless.  offline client is more complete