Sidetrain is an online marketplace connecting learners with expert tutors for personalized, one-on-one sessions across diverse subjects and skills.


Sidetrain is an online marketplace connecting learners with expert tutors for personalized, one-on-one sessions across diverse subjects and skills.


Developed over more than two decades in collaboration with leading game developers, Havok Physics is a fast and high-performance physics engine for games.



Logical Network Editor that runs in your browser. Currently supports basic gates using boolean logic, smart wire routing and network simulation. The simplicity allows to quickly understand the principles of binary logic and simple circuit design.

MicroDicom is an application for primary processing and preservation of medical images in DICOM format



Create personalized vocabulary flashcards. Instantly generate cards from highlighted text, subtitles, topics, and more with automatic translations.


The Encyclopedia of Mathematics wiki is an open access resource designed specifically for the mathematics community. The original articles are from the online Encyclopaedia of Mathematics, published by Kluwer Academic Publishers in 2002.

An app open-source where you can learn a new word every day. You can discover its pronunciation, its etymology, and many other details.



Server Fault is a Q&A site for system administrators and IT professionals that's free. Free to ask questions, free to answer questions, free to read, free to index, built with plain old HTML, no fake rot13 text on the home page, no scammy google-cloaking tactics, no...

ProgKids is an international online programming school designed for children aged 7-17, offering lessons in Russian and English. We make coding fun by incorporating Minecraft and Roblox into our curriculum.

An online teaching platform designed to help learners of all levels become confident and effective tutors. It offers 30 practical, interactive lessons covering topics such as identifying your teaching style, understanding how learners learn, delivering clear explanations...



A calculator with syntax highlighting that supports user-defined variables and functions, math-like syntax, and some more advanced operations such as derivation and integration (estimate), and complex numbers.



DP Education is a pioneering initiative committed to enhancing the learning experience for individuals across all walks of life. We believe that education should be personalized, accessible, and boundary-free, aligning with the diverse needs and aspirations of today's...

WilliStudy is a free to use studying app available on all Apple platforms. It helps you ace your tests with multiple different modes.




In the past, historical events of that day were shown under the calendar leaves. We also list the important events throughout history chronologically on the basis of date each day. With the notifications sent regularly every day, you can follow the historical events of your...




The Starry Night apps are the most comprehensive educational astronomy apps. Use it with your introductory astronomy textbook or on its own. It's a powerful, portable planetarium that fits in your backpack. It puts thousands of stars and planets at your fingertips.




Logisim is an educational tool for designing and simulating digital logic circuits. It has been originally created by Dr. Carl Burch and actively developed until 2011. After this date the author focused on other projects, and recently the development has been officially stopped...



Lessons Learned Server is a light-weight knowledge-base web application with powerful editing capabilities. Based on PHP and MySQL. Available as a downloadable server application or via cloud hosting.








Pluto.AI is your ultimate AI teacher, offering a unique blend of knowledge and assistance. With its cutting-edge technology, Pluto.AI stands out as your go-to assistant for all your intellectual questions.




Doksi.net provides a free knowledge repository. Guides, studies, reports and publications are available in 400+ categories. Totally free of charge.
Qsets is an offline flashcard-based learning application designed to help you master any topic at your pace and convenience. Whether you're studying for a big test, learning a new language, or simply trying to remember important information, Qsets makes it easy and flexible.




Tagaini Jisho is a free to use Japanese dictionary. It is available in several languages such as german or french.



AnkiMobile is a mobile companion to Anki, a powerful, intelligent flashcard program that is free, multi-platform, and open-source.




StudyBlue is your online home to store lecture notes and make flashcards. Study online and on your phone for effective, productive learning for free.
Interview Breeze helps software developers learn how to solve the most common computer science interview concepts and questions by walking them through easy to understand solutions step by step.


