They all run cyanogenmod.

The older wileyfox swift : http://www.wileyfox.com/swift-160.html

Updated version: http://www.wileyfox.com/swift-169.html

Swift 2+
http://www.wileyfox.com/swift2.html

Spark:
http://www.wileyfox.com/spark.html

Spark plus
http://www.wileyfox.com/sparkplus.html

Spark x
http://www.wileyfox.com/sparkx.html