Cost / License
- Free
- Proprietary
Application type
Platforms
- Online






Solve math problems with the GPT-4o—upload text or images for free solutions.

Wise Panda is your go-to platform for personalized Chinese language lessons. Each lesson is customized to fit your learning style and delivered by expert, verified tutors.



The Unsure Calculator is an online tool that lets you calculate with numbers you’re not sure about.

Acadly helps educators boost engagement inside and outside the classroom, and record attendance at the tap of a button. It is free for higher education, and saves students thousands of dollars per semester on expensive polling app subscriptions.



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


Influent is a video game aimed at inspiring people around the world to pick up a new language by making vocabulary acquisition and proper pronunciation a fun and rewarding experience. Players explore an interactive 3D environment filled with hundreds of selectable, collectible...




An online thesaurus and dictionary of over 145,000 words that you explore using an interactive map. It's a tool for people who think visually. The most fun you've ever had with words. The Visual Thesaurus was built using Thinkmap, a data visualization technology.


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.




Convertbot is a unit conversion robot. Convert currency, length, mass, time and much more in an exciting new way! Converting numbers will never again be a mundane task. In addition to its innovative interface, our robot is smart enough to convert to and from mixed units.



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



The HP48 Emulator Emu48 was originally created by Sébastien Carlier and is published under the GPL. The latest version of Emu48 can emulate a HP38G, HP39G, HP40G, HP48SX, HP48GX and a HP49G. The emulator is running on all Win32 platforms and the Mobile version should run on...



Best free AI-powered paraphrasing tool. Makes writing more powerful with its diverse paraphrasing modes, synonym changing, and tone customization options. Offers multimedia paraphrasing features like audio, image to text and speech to text paraphrasing.

Learn how to read the Bible to see, hear and know Jesus better. Access 100% free Bible videos, podcasts, blogs, classes, and educational Bible resources that help make the biblical story accessible.



With SoundHound Chat AI, simply ask for what you want, add follow-up questions, and get fast, accurate, up-to-date responses. Built on our leading independent voice AI platform, this app brings together the best-in-class conversational and generative AI technology for faster...



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


DeepDyve is the company behind LitHub, an AI-powered literature-management platform offering researchers affordable, publisher-licensed access to scientific, technical, and medical research. Users can read 35M+ paywalled and 25M+ open-access papers and search a discovery index...
Because beautiful tools make beautiful drawings, we endlessly refined Sketches brushes to create the most realistic drawing tools.



Learn a new language by practicing words and meanings in a language dictionary and training app.



Three-tabbed calculator for decimal, hexadecimal and binary for iOS built in Swift with Xcode. Provides numerous operations and seamless conversion between the three tabs.



TemaTres is an open source vocabulary server, web application to manage and exploit vocabularies, thesauri, taxonomies and formal representations of knowledge.




Braintain is your ultimate memory-boosting companion. This app is designed to help you effortlessly remember and expand your vocabulary in any language. With a variety of engaging exercises, personalized challenges, and innovative features.



zkanji is a free and open-source study tool and dictionary of the Japanese language. It has several useful features for beginners and advanced students alike. Dictionary, example sentences, kanji search and information with animated stroke order diagrams, vocabulary list...




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




OAPEN promotes and supports the transition to open access for academic books by providing open infrastructure services to stakeholders in scholarly communication. We work with publishers to build a quality-controlled collection of open access books and provide services for...
