• GlassActionBar
• aacdecoder-android
• Calabash
• Remote Android Test Service
• HoloEverywhere
• Android-RecurrencePicker

• Cardslib
• Driven
• Android ContentProvider Generator
• ProviGen
• Android-HybridChoice

• NineOldAndroids

Action Bars

• ActionBarSherlock
• Extended ActionBar
• FadingActionBar
• v7 appcompat library
• GlassActionBar

Advertisements

• AdMob
• Google Mobile Ads SDK
• InMobi
• MoPub
• Tapjoy

Analytics

• Capptain
• Countly
• Flurry
• Google Analytics

Animation

• NineOldAndroids

Architecture

• DroidParts
• GreenDroid
• Ignition
• Mortar
• Spring for Android

Audio

• aacdecoder-android
• Audio Wife
• Patchfield
• PlayerHater
• tomahawk-android
• TurtlePlayer
• Vanilla

Background Processing

• Android Priority Job Queue
• Groundy
• Tape

Backward Compatibility

• HoloEverywhere
• NineOldAndroids
• Support Library

Bar Codes

• Android Barcode Generator
• Scandit
• ZBar
• ZXing

Buttons

• android-process-button
• Flat Button
• TH-ProgressButton

CSV

• CSVReader
• opencsv

Caching

• Android-BitmapCache
• carbonite
• DiskLruCache

Calendars

• Android-RecurrencePicker
• ExtendedCalendarView
• MFCalendarView

Cards

• Cardslib

Changelog

• android-change-log
• ChangeLog Library
• ckChangeLog

Cloud Storages

• Driven

Color Pickers

• ColorPickerPreference
• HoloColorPicker

Content Providers

• Android ContentProvider Generator
• Content Provider Helper
• ContentProvider Generator
• OrmLiteContentProvider
• ProviGen
• SimpleProvider

Crash Reports

• ACRA
• BugSense
• Bugsnag
• Crashlytics
• Crittercism

Curl/Flip Effects

• android-flip
• android-FlipView
• android_page_curl

Date Pickers

• android-betterpickers
• android-datepicker
• DateTimePicker
• TimesSquare for Android

Demos

• Android-HybridChoice
• DevAppsDirect
• Google I/O App
• Libraries for developers

Dependency Injections

• AndroidAnnotations
• Butter Knife
• Dagger
• RoboGuice
• Transfuse

Design

• Android 4.0 Design Startkit
• Android App Patterns
• Android Niceties
• Android Patterns
• Google Android Design Guide
• ICS Apps

Dialogs

• afiledialog
• DirectoryChooser
• StyledDialogs

Event Buses

• greenrobot/EventBus
• Otto
• stickyd/eventbus

Fonts

• Calligraphy
• PixlUI

Graphics

• AChartEngine
• AFreeChart
• Android-Charts
• AndroidCharts
• Androidplot
• GraphView
• GraphWidget
• HoloGraphLibrary
• TeeChart for Android

Grid Views

• AndroidStaggeredGrid
• DynamicGrid
• StaggeredGridView

Gyroscope

• Seismic

HTML

• HtmlCleaner
• jsoup

IDE

• AIDE
• Android Studio
• Eclipse ADT
• IntelliJ IDEA

IDE Plugins

• Android for Maven Eclipse
• ButterKnifeZelezny
• Dagger IntelliJ Plugin
• Otto IntelliJ Plugin
• SelectorChapek

Image Croppers

• Android CropImage
• android-crop
• Cropper

Image Loaders

• Picasso
• Universal Image Loader for Android
• UrlImageViewHelper

Image Views

• Android StackBlur
• ImageViewZoom
• PhotoView
• Smart Image View
• Swipeable cards
• TouchImageView

JSON

• GSON
• Jackson
• Jackson jr
• JSON.simple

Layouts

• Android Empty Layout
• FlatUI
• ImageLayout

List View Adapters

• FunDapter
• MultiChoiceAdapter

List View Sections

• LetterSectionList
• ListviewFilter
• PinnedSectionListView
• StickyGridHeaders
• StickyListHeaders
• StickyScrollViewItems

List Views

• Android-MultiStateListView
• Android-ScrollBarPanel
• CustomListView
• DragSortListView
• EnhancedListView
• Horizontal Variable ListView
• LazyList
• ListViewAnimations
• SlideExpandableListView
• SuperListview
• SwipeListView

Logging

• hugo
• logback-android
• SLF4J
• slf4j-timber
• Timber

MIME

• Apache HttpMime
• Mime4j

Maps

• map-controller
• MapNavigator
• mAppWidget
• osmdroid
• Polaris

Navigation History

• Flow
• ParcelableCodeGenerator

Networking

• Async Http Client
• Ion
• Loopj
• OkHttp
• RoboSpice
• Volley

OCR Engines

• ABBYY Mobile OCR Engine
• android-ocr
• Tesseract

ORM

• ActiveAndroid
• ActiveRecord for Android
• Cupboard
• greenDAO
• OrmLite
• Persistence
• Sprinkles
• Sugar ORM

OpenGL

• AndEngine
• Dwarf
• jPCT AE
• libGDX
• min3d
• Rajawali

Parallax List Views

• Parallax ScrollView and ListView for Android
• Paralloid

Platforms

• Adobe AIR
• Appcelerator (Titanium Mobile)
• Corona SDK
• PhoneGap
• Unity

Progress Indicators

• Android-ProgressFragment
• GoogleProgressBar
• ProgressWheel

Protocol Buffer

• micro-protobuf
• platform_external_protobuf
• protobuf-j2me
• wire

Pull To Refresh

• ActionBar-PullToRefresh
• Android-PullToRefresh
• PullToRefresh-ListView
• SwipeRefreshLayout

Purchases

• Amazon in-app purchasing
• Google Play in-app billing

Push Notifications

• Amazon Device Messaging
• java-apns

REST

• DataDroid
• Http Request
• Retrofit

Ratings

• AppRater
• Discreet App Rate

Reactive Programming

• RxJava

Scripting

• android-scripting
• FASL
• jnlua-android

Sliding Panels

• Android Sliding Up Panel
• SlidingLayer

Social Networks

• AndroidSocialNetworks
• Bitlyj
• Facebook SDK
• JTwitter
• Scribe
• Simple Social Sharing
• Twitter4J

Template Languages

• Chunk
• Phrase

Toasts

• Android-UndoBar
• AppMsg
• Crouton
• MessageBar

Tools

• Android Action Bar Style Generator
• Android Holo Colors Generator
• AndroidAssetStudio
• GridWichterle
• HockeyKit
• Scalpel

Utils

• Apache Commons Codec
• Apache Commons IO
• AQuery
• Guava
• Joda Time
• Okio

Validation

• Android Saripaar
• Android-Validator
• ValidationKomensky

Video

• AndroidFFmpeg
• ijkplayer
• libstreaming
• Vitamio
• YouTube Android Player

View Pagers

• PagerSlidingTabStrip
• ParallaxHeaderViewPager
• VerticalViewPager
• ViewPagerIndicator

View

• BadgeView

XML

• JDOM
• kXML
• Simple