ESA:
Drop Your Thesis! Programme
The Drop Your Thesis! Programme gives university students, from Bachelor’s to PhD level, the opportunity to perform scientific or technological research in microgravity conditions using the ZARM drop tower in Bremen (Germany). The gravity levels that are obtained in this facility are as low as 10-6 g and last for about 5 to 10 seconds. The programme usually opens a call for proposals once a year in September and the launch campaign is organized in November the following year.
http://www.esa.int/Education/About_Drop_Your_Thesis
Spin Your Thesis! Programme
The Spin Your Thesis! Programme gives university students, from Bachelor’s to PhD level, the opportunity to perform scientific or technological research in hyper gravity conditions using the ESA’s Large Diameter Centrifuge. This facility offers accelerations between 1 and 20 times Earth’s gravity. The programme usually opens a call for proposals once a year in September and the campaign is organized in September the following year.
http://www.esa.int/Education/Spin_Your_Thesis!_programme
REXUS and BEXUS programme
The REXUS / BEXUS programme is realized under a bilateral Agency Agreement between the German Aerospace Center (DLR) and the Swedish National Space Board (SNSB) in collaboration with the European Space Agency (ESA). This programme offer opportunities for university student experiments to be flown on sounding rockets and stratospheric balloons. The programme usually opens a call for proposals once a year in June and the BEXUS campaign is organized in autumn the following year and the REXUS in spring two years after.
Fly Your Thesis! Program
The Fly Your Thesis! (FYT) program gives university students from master to PhD levels the opportunity to fly their scientific experiment or technological research in microgravity conditions. The parabolic flight campaign takes place on the Airbus A310 Zero-G, which is operated by Novespace from Bordeaux, France. Each campaign consists of a series of three flights of 30 parabolas each. These will provide about 20s of microgravity each. The program usually opens a call for proposals once a year and the launch campaign is organized a year or year and a half later.
http://www.esa.int/Education/Fly_Your_Thesis/Fly_Your_Thesis!_programme