If you're going to use a RF module that needs an SMA antenna, we've got you covered! Here's a 152mm swivel/tilt whip with RP-SMA connector!
This small key fob transmitter / receiver pair has 4 channels and a range of about 200'.
This easy to use and low cost module is capable of sending and receiving serial data wirelessly between microcontrollers or to a PC. The low power consumption makes this module ideal for use in battery powered applications.
This Arduino shield interfaces the Pololu Wixel wireless modules to your Arduino-compatible project, enabling simple wireless programming, debugging, and control using standard Arduino software.
The Pololu Wixel is a general-purpose programmable module featuring a 2.4GHz radio and USB.
Want to do some wireless communication for the Arduino, but on the cheap? The Wicked Devices 433MHz Receiver Shield will give your Arduino-compatible ears!