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.
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!
You want to make this thing talk to that thing waaay over there? Try the SeeedStudio super-long range 433Mhz RF link bundle! They're claiming 2KM range for wireless data transport & remote control use!