I have quite an extensive collection - as both an FTE and TP it's a topic that I've often thought a lot more attention should be paid to. I've had occasion to teach test card design on various courses also.
I've attached to this message four sorties worth of test cards, they were designed for a task I flew and managed a few years ago. The task was taking an Auster J5L, which was a British 1950s military training aeroplane. The specific aeroplane - last remaining of the variant had been rebuilt after sitting on the ground for 10 years, so I had to do an accelerated but fairly complete clearance programme on it for corporate knowledge of the authority, as well as to establish the basic safety of the aeroplane.
This is a completed test card for a series of handling qualities tests on a Cessna C150 variant. I flew as TP, the FTE was a chap called Mike Bromfield, now a senior lecturer (Associate Professor to Colonials) at the University of Coventry and the data from it ended up in his PhD thesis which you can find on the web somewhere.
This is a sort of combined test schedule and test cards (some organisation TPs used it as test cards, personally I made up separate smaller test cards then filled it in on the ground as the cockpit was somewhat cramped - but the format would work relatively well in a large jet, especially for use by a dedicated FTE). The aeroplane it's designed for is basically a slightly scaled down copy of a Super Cub. It covered multiple sorties for a new build aeroplane from first flight to the point it can be handed over to non-TPs for endurance proving prior to issue of a non-expiring Permit to Fly.