Dev tools · alternatives · 2026
24 alternatives to CK-12 Foundation - FlexBooks®
Free, digital, and customizable STEM textbooks for K-12
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. CK-12 Foundation - FlexBooks® launched in 2017; newer entries below may have overtaken it.
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Learn to code & build iOS apps with no experience for $0 💻📱
2018 · devslopes.com · its alternatives →
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Summary of Apple's Swift language written on Playgrounds
2016 · github.com · its alternatives →
- 4
An open source tool for context-aware digital textbooks
2015 · hypersay.com · its alternatives →
- 5
Free eBook on cross platform mobile app development
2016 · leanpub.com · its alternatives →
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Learn math, biology, chemistry, economics, & more for free
2015 · apps.apple.com · its alternatives →
- 10
A Github-hosted curriculum on Swift for teachers by Apple
2015 · swifteducation.github.io · its alternatives →
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Ebook for building scalable apps with Node
2016 · oreilly.com · its alternatives →
- 14
The textbook marketplace for the 21st century
2018 · apps.apple.com · its alternatives →
- 15
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Get free and discounted Ebooks of your print or paper books
2015 · its alternatives →
- 17
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Chrome extension to easily surface cheaper textbooks
2015 · occupythebookstore.com · its alternatives →
- 19
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Cinder▲122Free and open source library for creative coding in C++
2017 · libcinder.org · its alternatives →
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The world's first 'fully' open source book
2015 · kickstarter.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →