
Open NASA
Google Open Source
Open Source @IFTTT
Nike OSS
NASA Image and Video Library
OpenKube
OpenMCT by NASA
253 NASA open source software projects

Memrise
Busuu
Babbel
Anki
Lingvist
Rosetta Stone
Mondly
Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.

Which is more popular?
Based on our record, Duolingo should be more popular than Code NASA. It has been mentioned 70 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | code.nasa.gov | duolingo.com |
| Company | — | Startup from the United States · 500 - 999 employees · 2011 |
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What each product offers, as listed by its team.


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How often each product is chosen within a category, 0–100% relative to the other.


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For AI conversation practice, Duolingo Max is the tier to choose, and we'd call it a useful upgrade only if those extra features matter to you. It sits above the paid Super Duolingo tier rather than directly above the...
Our team of dedicated writers and language enthusiasts is committed to bringing you insightful content and expert advice to enhance your Duolingo experience. From language-learning tips to in-depth analyses of...
Language learning apps such as Duolingo, Babbel and others have millions of registered users worldwide. Duolingo alone has over 300 million registered users.
Recommendations tracked on public social media and blogs since March 2021.


Just to be clear this is one center’s first open source release. There’s open source from other centers at https://github.com/nasa. - Source: Hacker News / over 1 year ago
NASA has a good set of open source projects available for public use: https://code.nasa.gov/. - Source: Hacker News / about 3 years ago
Yes, this is no-cost but not necessarily open source. NASA open source software can be found at: https://code.nasa.gov/. - Source: Hacker News / over 3 years ago
Duolingo: a language-learning app that uses points, levels, and rewards to keep you motivated. This is the most effective when you do it with your friends or a group of people who share your learning goals. I got really addicted to... Source: over 3 years ago
Hi! I wish I'd seen a post like this a few months ago. I would have been interested then. By now it's a little late for me. I just signed up for the 2 week free trial since that's about all the time I have left before I leave. If you... Source: over 3 years ago
If you want a guided course try Memrise or Duolingo. Source: over 3 years ago
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All of Googles open source projects under a single umbrella
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Join the global language learning community, take language courses to practice reading, writing, listening and speaking and learn a new language. Learn English with busuu's .
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A collection of IFTTT OSS projects.
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Babbel is a paid language learning service that aims to strike a balance between thoroughness and cost efficiency.
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