The most exciting projects

Rating list is based on the Github and Android Arsenal activities.
Commercial
1. Font Awesome
Details
May 18, 2019
2. OpenCV
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May 10, 2019
3. RxJava
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May 19, 2019
4. Material Design icons
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Apr 13, 2019
5. JSON Server
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May 5, 2019
6. Guava
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May 14, 2019
7. OkHttp
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May 12, 2019
8. Retrofit
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Apr 19, 2019
9. MPAndroidChart
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May 8, 2019
10. Tesseract
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May 12, 2019
11. Kotlin
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May 19, 2019
12. ZXing
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May 14, 2019
13. AndroidUtilCode
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May 9, 2019
14. Glide
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May 1, 2019
15. Lottie
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May 21, 2019
Commercial
16. lottie-android
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May 16, 2019
17. Butter Knife
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Apr 16, 2019
18. Syncthing
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May 16, 2019
19. Godot
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May 16, 2019
20. google-styleguide
Details
May 8, 2019
Blurb
21. LeakCanary
Details
May 10, 2019
22. greenrobot/EventBus
Details
May 8, 2019
23. Universal Image Loader for Android
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May 13, 2019
24. fastjson
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May 15, 2019
25. libGDX
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May 9, 2019
26. cocos2d-x
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May 11, 2019
27. Picasso
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May 2, 2019
28. RxAndroid
Details
Feb 16, 2019
29. JADX
Details
May 11, 2019
30. BaseRecyclerViewAdapterHelper
Details
May 9, 2019