Michael Ossmann just announced the YARD STICK One, from Great Scott Gadgets:

This week we started shipping YARD Stick One, our latest test tool for radio systems operating below 1 GHz. The first thing you should know about it is that, unlike our popular HackRF One, YARD Stick One is not a Software Defined Radio (SDR) platform. Although we think that SDR is the overall best tool for the greatest number of wireless applications, sometimes it is beneficial to have a simpler tool for certain jobs. YARD Stick One (Yet Another Radio Dongle) can transmit or receive digital wireless signals at frequencies below 1 GHz. It uses the same radio circuit as the popular IM-Me. The radio functions that are possible by customizing IM-Me firmware are now at your fingertips when you attach YARD Stick One to a computer via USB. Capabilities:
* half-duplex transmit and receive
 * official operating frequencies: 300-348 MHz, 391-464 MHz, and 782-928 MHz
 * unofficial operating frequencies: 281-361 MHz, 378-481 MHz, and 749-962 MHz
 * modulations: ASK, OOK, GFSK, 2-FSK, 4-FSK, MSK
 * data rates up to 500 kbps
 * Full-Speed USB 2.0

More information:

http://greatscottgadgets.com/yardstickone/
‏http://greatscottgadgets.com/2015/09-30-introducing-yard-stick-one/