Some library, useful things for Android development
Library: https://github.com/sephiroth74/ImageViewZoom - zoom and pan for imageView https://github.com/lucasr/twoway-view - vertical, horisontal and grid adapter based on recyclerView https://github.com/evant/holdr - butterKnife/roboGuice killer
DB:
https://github.com/Jearil/SimpleNoSQL - simple asynchronous object to storage writter/reader https://github.com/pardom/ActiveAndroid https://github.com/jgilfelt/android-sqlite-asset-helper
Tools:
https://www.buzzingandroid.com/tools/android-layout-finder/ - xml -> findViewById or InjectView https://github.com/marcoRS/lint-cleaner-plugin - remove unused resources finded by lint https://github.com/Bearded-Hen/Android-Bootstrap - awesome UI elements library (buttons, edittext, textView etc) https://github.com/greenrobot/greenrobot-common - file, string, date, time utils collection in small lib
Articles:
https://speakerdeck.com/cyrilmottier/deep-dive-into-android-state-restoration - save Activity/Fragment state on phone changes (locale, configuration etc).
https://github.com/iluwatar/java-design-patterns - design patterns with java.
design (UI)
http://www.materialpalette.com/ - material pallete