Libraries Available For Arduino

An Arduino Board [Arduino BT(BlueTooth)]
An Arduino Board [Arduino BT(BlueTooth)]

There are various libraries that are available for Arduino, they may be in original form, or a custom one, or even build by us!
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Libraries provide extra functionality for use in sketches, e.g. working with hardware or manipulating data. To use a library in a sketch, select it from Sketch > Import Library.

Standard Libraries

  • EEPROM - reading and writing to "permanent" storage
  • Ethernet - for connecting to the internet using the Arduino Ethernet Shield
  • Firmata - for communicating with applications on the computer using a standard serial protocol.
  • GSM - for connecting to a GSM/GRPS network with the GSM shield.
  • LiquidCrystal - for controlling liquid crystal displays (LCDs)
  • SD - for reading and writing SD cards
  • Servo - for controlling servo motors
  • SPI - for communicating with devices using the Serial Peripheral Interface (SPI) Bus
  • SoftwareSerial - for serial communication on any digital pins. 
  • Stepper - for controlling stepper motors
  • WiFi - for connecting to the internet using the Arduino WiFi shield
  • Wire - Two Wire Interface (TWI/I2C) for sending and receiving data over a net of devices or sensors. 

USB Libraries

  • Keyboard - Send keystrokes to an attached computer.
  • Mouse - Control cursor movement on a connected computer.

Due Only Libraries

  • Audio - Play audio files from a SD card.
  • Scheduler - Manage multiple non-blocking tasks.
  • USBHost - Communicate with USB peripherals like mice and keyboards.

Esplora Only Library

  • Esplora - this library enable you to easily access to various sensors and actuators mounted on the Esplora board.

Contributed Libraries

If you're using one of these libraries, you need to install it first. Communication (networking and protocols):
  • Messenger - for processing text-based messages from the computer
  • NewSoftSerial - an improved version of the SoftwareSerial library
  • OneWire - control devices (from Dallas Semiconductor) that use the One Wire protocol.
  • PS2Keyboard - read characters from a PS2 keyboard.
  • Simple Message System - send messages between Arduino and the computer
  • SSerial2Mobile - send text messages or emails using a cell phone (via AT commands over software serial)
  • Webduino - extensible web server library (for use with the Arduino Ethernet Shield)
  • X10 - Sending X10 signals over AC power lines
  • XBee - for communicating with XBees in API mode
  • SerialControl - Remote control other Arduinos over a serial connection 

  • Capacitive Sensing - turn two or more pins into capacitive sensors
  • Debounce - for reading noisy digital inputs (e.g. from buttons)
Displays and LEDs:
  • GFX - base class with standard graphics routines (by Adafruit Industries)
  • GLCD - graphics routines for LCD based on the KS0108 or equivalent chipset.
  • Improved LCD library fixes LCD initialization bugs in official Arduino LCD library
  • LedControl - for controlling LED matrices or seven-segment displays with a MAX7221 or MAX7219.
  • LedControl - an alternative to the Matrix library for driving multiple LEDs with Maxim chips.
  • LedDisplay - control of a HCMS-29xx scrolling LED display.
  • Matrix - Basic LED Matrix display manipulation library
  • PCD8544 - for the LCD controller on Nokia 55100-like displays (by Adafruit Industries)
  • Sprite - Basic image sprite manipulation library for use in animations with an LED matrix
  • ST7735 - for the LCD controller on a 1.8", 128x160 TFT screen (by Adafruit Industries)
Audio and Waveforms:
  • FFT - frequency analysis of audio or other analog signals
  • Tone - generate audio frequency square waves in the background on any microcontroller pin
Motors and PWM:
  • TLC5940 - 16 channel 12 bit PWM controller.
  • DateTime - a library for keeping track of the current date and time in software.
  • Metro - help you time actions at regular intervals
  • MsTimer2 - uses the timer 2 interrupt to trigger an action every N milliseconds.
  • PString - a lightweight class for printing to buffers
  • Streaming - a method to simplify print statements 
NOTE:-  As we all know that Arduino is an Open Source Platform, it gives all its user a chance to work for its further development. As per the current stats, everyday somewhere in this world write an Arduino Library for a purpose, so what ever you require, that may be even not present in the above list, but still could be found just by few relevant keywords use in the search engine.
Know how to write your own Arduino Libraries, Click Here.