Green Current has made simple development cards to support fast prototyping needs when implementing designs for customers. Boards are quite modular in nature connecting to each other for more usefull functionality.
Boards are available separately or together with debugging tools.

RS232 level shifter

Connects directly to wireless modules. Can be used to have serials connection trough wireless connection.

USB serial port

Same functionality as RS232 level shifter. But supports two serial connections. Addionally can be used as JTAG-debugger with OpenOCD.