Serial-In - Parallel-Out shift register in DIP16 package. Ideal for Arduino projects requiring large number of pins (for example driving LED matrix).

ATMega328 microcontroller pre-loaded with Arduino Uno bootloader.

The new bootloader supports also older Arduinos like Duemilanove.

Xbee module from Digi (formerly MaxStream). The module can communicate up to 30 meters indoors or 100 meters outdoors (with line-of-sight). It can be used as a serial/usb replacement or you can put it into a command mode and configure it for a variety of broadcast and mesh networking options.

Classic multipurpose timer chip. 

Can be cut to any size. 

Standard 1,8 meter USB cable suitable for Arduino or USBTinyISP programmer.

DS18B20 uses 1-wire protocol and needs only two wires, ground and data. Easy to communicate from Arduino (examples can be found at arduino website).

This is a simple to use, USB to serial base unit for the XBee modules. This unit works with all XBee modules including the Seris 1 and Series 2.5, standard and Pro version. Plug the unit into the XBee Explorer, attach a mini USB cable, and you will have direct access to the serial and programming pins on the XBee module.