Cost / License
- Free
- Proprietary
Platforms
- Online
Knowledge is indeed power and even more so in this modern world of incredibly fast paced advancements in science and technology.

Calculator with percentages, powers and functions. History with comments that is synced across all your devices. Cursor for editing anywhere. Simple interface with dark and light themes.




A simple web app filled with CS courses designed to give developers the skills they need to get a high-paying job.




A social network for learners to share reviews on learning resources like books, courses, apps, podcasts, newsletters, livestreams etc. Open-source and ActivityPub compliant.

A minimalistic digital logic simulator. You start with an AND and a NOT gate, and from there you can build whatever you want.


Readitfor.me is designed to empower individuals, entrepreneurs, small teams and large organizations to discover and apply powerful ideas, strategies and best practices. We create animated videos, audio files and text summaries of the best selling books on leadership, marketing...




Improve your mathematics skills with us. We improve student performance by using gamified quizzes, practice questions, and video lectures. We allow students to compete against their peers and maintain a positive competitive environment in order to inspire and enhance their...



Numsy is the fastest, most elegant way to perform calculations on your Mac. Designed to sit perfectly in your menu bar, it stays out of your way when you're focused and appears instantly when you need to crunch numbers.




BibDesk is a bibliographic reference manager for Mac OS X. BibDesk is designed to help organize and use bibliographic databases in BibTeX .bib format.



Hanzi Deck is a Chinese character learning app designed to help you master strokes writing, memorize, and build vocabulary at your own pace and choice.




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




Can’t see the moon? Want to know where it is? Look through the eyes of your device to see a virtual window into the whole visible universe.




The one place to discover books that have helped successful solopreneurs and indiehackers grow their businesses and careers.




ScrewTurn Wiki allows you to create, manage and share wikis in 23 languages. A wiki is a collaboratively-edited, information-centered website: the most famous is Wikipedia.

MyBooks.Life is an android app and website that allows you to search for books (via ISBN, or title & author) and add them to your library.




Translation tool with online/offline modes, syncs across devices, includes a translator, dictionary, and phrasebooks, plus translation widget and iMessage app.


Onelook Thesaurus and Reverse Dictionary lets you describe a concept and get back a list of words and phrases related to that concept. Your description can be anything at all: a single word, a few words, or even a whole sentence.
TINA Design Suite is a powerful circuit simulation package for analyzing, designing, and real time testing of analog, digital, VHDL, MCU, SMPS, RF, communication, optoelectronic and mixed electronic circuits and their PCB layouts.




Provide a simple and clean environment for everyone to practice their typing skills online for free.




On the web, there are tree-structure note-taking tools, and some people love them because these tools are really good at organizing information. There are also SR (Spaced Repetition) tools, and some people love them because these tools help them remember information with minimal...


Brian is a simple-to-use learning app that helps you remember subjects and topics better.




This app is your key to accessing the Word of God in a straightforward, engaging way, offline, and with no advertisements to distract you.

Auto Streamer is a multi-purpose, generative AI platform that brings a revolution in the realm of education. With the capability to create and broadcast web-based courses in a plethora of languages, it stands at the forefront of educational innovation.

Open Learning Initiative - Dedicated to improving higher education by supplying online interactive instruction supported by learning research.