SlideDayTimePicker is an Android library that displays a single DialogFragment in which the user can select a day of week and a time. The user can swipe between the day picker and time picker, and the tab underline will gradually animate as the user swipes. The colors of the tab indicator and divider lines are customizable to fit your project's theme.

Routable is an in-app native URL router, for Android.

AndroidTwitter is a small android library to let you connect to Twitter and access all it's public API (tweet status, retweet, etc).

AutoCompleteBubbleText allows you to add and remove items from an EditText using a drawable as a background.

The benefit of AutoCompleteBubbleText is that you can position the ListView anywhere in the layout instead of just under the EditText. You can also use the autocomplete filtering function of the EditText to filter items in the list.

Gradle plugin to use Android AAR libraries on Eclipse.

You can manage dependencies with Gradle and build app on Eclipse.

subsampling-scale-image-view is a custom image views for Android, designed for photo galleries and displaying huge images (e.g. maps and building plans) without OutOfMemoryErrors. Includes pinch to zoom, panning, rotation and animation support, and allows easy extension so you can add your own overlays and touch event detection.