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Sites/Blogs
http://arduino.cc/
http://www.geek-workshop.com/
http://www.arduino123.com/
http://www.arduino.cn/
http://bbs.yeelink.net/forum.php?mod=forumdisplay&fid=41
http://tonylabs.com/zh/tutorials
http://www.eefocus.com/zhang700309/blog/
http://www.openjumper.cn/
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Articles
http://learn.adafruit.com/dht (DHTxx Sensors)
http://learn.adafruit.com/using-the-adafruit-library-with-fritzing/download-the-fritzing-library-from-github (Using the Adafruit Library with Fritzing)
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Libraries
Seven Segment
http://playground.arduino.cc/Main/SevenSegmentLibrary
https://docs.google.com/file/d/0Bwrp4uluZCpNdE9oWTY0M3BncTA/edit?usp=sharing
增强
https://github.com/sparkfun/SevSeg
http://ponty.github.io/SevSeg/
QP - Event-driver framework
http://www.state-machine.com/arduino/
http://playground.arduino.cc/Code/QP
IRremote
https://github.com/shirriff/Arduino-IRremote
Webduino
https://github.com/sirleech/Webduino
pachubelibrary - Library to communicate with pachube server
https://code.google.com/p/pachubelibrary/
aJson - an Arduino library to enable JSON processing with Arduino.
https://github.com/interactive-matter/aJson
http://interactive-matter.eu/how-to/ajson-arduino-json-library/
u8glib - Universal Graphics Library for 8 Bit Embedded Systems
https://code.google.com/p/u8glib/
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Softwares/Tools
Arduino IDE
https://code.google.com/p/arduino/
Fritzing
http://fritzing.org/
ArduBlock
http://blog.ardublock.com/zh/
Serial Chart
https://code.google.com/p/serialchart/
Arduino Ide for Visual Studio
http://www.visualmicro.com/
A Win32 command-line utility for converting a binary file into a C header file, representing the contents of that file as a block of data.
http://www.deadnode.org/sw/bin2h/
OpenJumper Serial Assistant
http://x.openjumper.com/serial/
http://www.arduino.cn/thread-1183-1-1.html
Arduino Hex Uploader and Programmer
http://www.ngcoders.com/downloads/arduino-hex-uploader-and-programmer/
http://www.dustless.cn/?p=184
Arduino Builder – standalone utility for building and uploading Arduino sketches
http://arduinodev.com/arduino-uploader/
LED数码管段码生成器
http://www.geek-workshop.com/forum.php?mod=viewthread&tid=389
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芯片/硬件/模块
DHT11 - 数字温湿度传感器
http://www.aosong.com/cn/products/details.asp?id=109
nRF24L01 - 由NORDIC生产的工作在2.4GHz~2.5GHz的ISM 频段的单片无线收发器芯片
DS1302 - 时钟模块
LM35 - 是由National Semiconductor 所生产的温度传感器
W5100 - 是一款多功能的单片网络接口芯片，内部集成有 10/100以太网控制器，主要应用于高集成、高稳定、高性能和低成本的嵌入式系统中。
ENC28J60I - Stand-Alone Ethernet Controller with SPI Interface