autoport has a summary of the drivers testing at the nurburgring over the next few days. if you don't want to use one of your views of their website to find out:
ilott, pedro piquet and harrison newey are testing with var, carlin have maini and niko kari, motopark has sergio sette camara, alessio lorandi, julio moreno and joel eriksson. hitech are running russell and mazepin.
also there is a bunch of f4 and formula renault teams. norris is testing with kaufmann, fwiw.