GNSS-receiver-tools is planned to be a set of tools for working with GPS/GLONASS/Beidou/Galileo receivers. At the moment it works with NavSparks and likely any SkyTraq Venus 6 or 8 based receiver.
So far it mostly consists of lots of C++ classes representing the Venus 6/8 binary message protocol, as well as sending/receiving these messages.
A single parse-skytraq program is all that exists so far. It displays data about some of the messages sent from the receiver. It also allows you to set the update rate (1, 2, 4, 5, or 10 Hz) with '-r', and select between text ('-t') or binary ('-b') output.
The Doxygen-generated class documentation is available at imroy.github.io/GNSS-receiver-tools