A list of the 94 libraries that are licensed with the GPL 2.0 license.
| AGirs | A Girs infrared server for the Arduino platform. |
| Accessories | This is a library for Arduino to handle accessories like lights, motors. |
| advancedSerial | An Arduino library with additions to vanilla Serial.print(). Chainable methods and verbosity levels. Suitable for debug messages. |
| Ai Esp32 Rotary Encoder | Easy implement rotary encoder to your application for ESP32 and ESP8266 |
| ANT-Arduino | Library for communicating with various ANT radios from Dynastream Innovations. |
| ANTPLUS-Arduino | Library for easy ANT+ integration |
| arduinoVNC | VNC Client for Arduino |
| Arduino_OV767X | Capture images from your OmniVision OV7670 camera in your Arduino sketches. |
| Beacon | An AMX-style Ethernet beacon, allowing for remote discovery. |
| BohleBots_BNO055 | Library for the BNO055 as easy to use compass. |
| Cojson | Zero-effort JSON reading and writing on Arduino platforms, |
| Commanders | This is a library for Arduino to handle input devices like buttons, Dcc (railroad modeling), CAN or I2C bus, or serial interface to give orders. |
| DCCpp | This is a library to control DCC devices. |
| DcDccNanoController | This library is made to build a basic Dcc controller on small Arduino Nano or Uno. |
| Deneyap OLED Ekran | Library for Deneyap OLED Display Module SSD1306 |
| DIO2 | Fast digital input/output functions. |
| DisplayUtils | Utility classes to help working with displays (eg large fast changing numbers) |
| DistanceSensor | HC-SR04 distance sensor library. |
| ELi_McM_4_00 | A library for using Microcontroller modules of E-LAGORi. |
| EEPROMextent | This is a library for Arduino to read/write complex data to EEPROM. |
| Elegoo | This is a library to use the ELEGOO Smart Robot Car Kit. |
| EncoderButton | Lossless event based rotary encoder & button library |
| ERO | A library make learning basic robotic easier. |
| esp32-flashz | ESP32-FlashZ arduino library |
| EtherCard | EtherCard is an IPv4 driver for the ENC28J60 chip. |
| EventAnalog | Event based library for analog inputs. |
| EventButton | Event based button library |
| EventJoystick | Event based library for analog joysticks. |
| FacebookApi | A wrapper for the Facebook Graph API for Arduino (supports ESP8266 & WiFi101 boards) |
| FortniteAPI | Arduino library to access unofficial Fortnite API. |
| GigaScope | A library allowing you to use your Arduino as a basic osciloscope. |
| GlobalCovfefe | An emulation of a GlobalCache device with one IR sender and (optionally) an IR learner (demodulating or non-demodulating). |
| GoogleMapsApi | A wrapper for the Google Maps API for Arduino (supports ESP8266 & WiFi101 boards) |
| Grove - OLED Display 0.96 | Arduino library to control Grove - OLED Display 0.96. |
| HeatpumpIR | Heatpump / Air Conditioner infrared control |
| HeliOS | An open source, community delivered, embedded operating system project. |
| I2C-Sensor-Lib iLib | Library for i2c-sensors and some other specific functions (fast eFn, HDLC, SpektrumSerial). |
| I2Cwrapper | I2Cwrapper is a generic modular framework which helps you implement Arduino based I2C target (slave) devices for control of non-I2C hardware. |
| IFTTTMaker | A helper library for triggering IFTTT maker events (ESP8266 & Wifi-101) |
| Infrared | An object oriented library for sending, receiving, generating, and decoding IR signals on the Arduino. |
| InstagramStats | Get Instagram Stats on your Arduino (supports ESP8266, ESP32 & WiFi101 boards) |
| InstructableApi | A wrapper for the Instructables API for Arduino (supports ESP8266, ESP32 & WiFi101 boards) |
| keyboardButton | Convinient way to map a push-button to a keyboard key. This library utilize the ability of 32u4-based Arduino-compatible boards to emulate USB-keyboard. |
| LcdUi | This library is made to build sophisticated User Interface on Arduino for text Lcds. |
| LibLCC | A library for interfacing with LCC(Layout Command Control) |
| LightDimmer | This library allows to drive LEDs to simulate railroad signals. |
| LightEffect | This library allows you to easily create light animations from an Arduino board or an ATtiny microcontroller (traffic lights, chaser, shopkeeper sign, etc.) |
| LittleFS_esp32 | LittleFS for esp32 based on esp_littlefs IDF component. Use esp32 core-provided LITTLEFS library instead of this one when available in future core releases. |
| MatrixMath | Minimal linear algebra library |
| MemoryUsage | Use this library to check your SRAM / Stack memory usage. |
| MicroMidiDevices | Arduino (very) Simple Library to manage various input devices as MIDI controllers |
| MicroMidiEnc | Arduino (very) Simple Library to manage Rotary Encoders as MIDI messages over USB |
| MicroMidiPot | Arduino (very) Simple Library to manage potentiometer (smoothed) as MIDI messages over USB |
| MideaIRWrapper | A library that makes, easier work with Midea Air Conditioners. |
| NanoBLEFlashPrefs | Substitute for the missing EEPROM storage on Arduino Nano 33 BLE and BLE Sense. |
| NDNOverUDP | A simpler and lighter NDN protocol for local IoT contexts. |
| NE555 | Simulation of the function from a NE555 timer chip. ;) |
| NeoNextion | Arduino library for controlling Nextion displays |
| OctoPrintAPI | Arduino library to access OctoPrint API. |
| OLED Display 96x96 | Arduino library for controlling OLED Display 96x96, using I2C communication. |
| ParseCommands | Evaluate commands entered over serial or as string and call a defined function. |
| PCF8523 | Arduino Library for PCF8523 Real-Time Clock |
| PressureNXPMXP | Pressure differential MXP serie |
| RCWL_1X05 | A library for the I2C mode of ultrasonic distance sensors RCWL-1605, RCWL-1005, and probably HC-SR04P |
| RF24 | Radio driver, OSI layer 2 library for nrf24L01(+) modules. |
| RF24Mesh | OSI Layer 7, Automated 'mesh' style networking for nrf24L01(+) radios. |
| RF24Network | OSI Layer 3 Networking for nrf24L01(+) devices. |
| RGB LED Lighting Shield XMC1202 | This library provides an interface to communicate with the RGB LED Lighting Shield XMC1202 via I2C interface. |
| RingBuffer | This library allows to use ring buffer with and without interrupts. |
| Rivers Engineering | Arduino library for engineering classes at The Rivers School |
| rrdtool | Round Robin Database Tool |
| ScheduleTable | This library allows to schedule multiple actions along time. |
| Servo328 | A servo motor driver for Arduino Uno with ATmega328P PWM |
| SevenSegmentTM1637 | Library for using a 4 digit seven segment display with TM1636 or TM1637 driver IC |
| Sleepy Pi 2 | Arduino Library for Sleepy Pi 2 Raspberry Pi HAT |
| SlowMotionServo | This library allows to move multiple servos slowly. |
| Snowduino | A library with faster commands for SAMC21 |
| Soldered nRF24 Library | nRF24 Library for Soldered Boards |
| Speeduino | A library with faster commands for SAMD21 |
| StereoSID | MOS6581 Stereo SID Emulator Arduino Library |
| STMSpeeduino | A library with faster commands for STM32H747 |
| SunFounder AI Camera | SunFounder AI Camera library. |
| sunset | Allows calculation of sunrise, sunset, and moonphase |
| SuplaDevice | Library enables you to connect the device to the SUPLA automation system. |
| ThingESP | Arduino library for the ThingsESP Platform. |
| ThingsIoT | Arduino library for the ThingsIoT Cloud Platform. |
| TI_SN76489 | Arduino (Uno) Library to manage Texas Instruments SN76489 sound chip |
| TouchKeypad | A keypad for touchscreens. |
| TwitterApi | A wrapper for the Twitter API for Arduino (supports ESP8266 & WiFi101 boards) |
| VivicoreSerial | Library to talk with VIVIWARE Cell Core. |
| Wio cell lib for Arduino | Wio 3G and Wio LTE M1/NB1(BG96) boards driver. |
| Wio LTE for Arduino | The LTE module driver for Wio LTE. |
| wolfssl | A lightweight SSL/TLS library written in ANSI C and targeted for embedded, RTOS, and resource-constrained environments. |
| XBee-Arduino library | Library for talking to to various wireless XBee modules from Digi. |