What are these small jets and large propeller aircraft flying in formation?
The design on the belly of the fighters makes it clear that they are from the Patrouille Suisse, the aerobatic team of Switzerland. They use F-5E.

From the comment in the page you linked (or from the aircraft registration HB-RSC, as suggested by @falstro), instead, we see that the other aircraft is the Breitling (hence the "B") Super Constellation:


  The Breitling Super Constellation from the Swiss Super Constellation Flyers Association: It is the last Super Constellation in flying condition in Europe.