Great summer programs for post-seniors?

I know there are lots of summer programs for juniors, but are there any selective application based ones for seniors?
I am talking about the type where you need to apply and be selected, not the type where you fork over a few grand.
For example, RSI and SSP do not accept senior applications. I am looking for alternatives if I don’t get into MOP again this year. Are there any good programs you guys know of? I plan on spending a very nice preferably STEM based/research experience during the summer before heading off to undergrad.

Jackson Labs is prestigious, fully funded (plus a stipend) and competitive, and accepts post-seniors:

https://www.jax.org/education-and-learning/high-school-students-and-undergraduates/learn-earn-and-explore

NASA accepts internship applications from current high school seniors:

https://intern.nasa.gov/ossi/web/public/main/

The Navy’s Science and Engineering Apprenticeship (SEAP) is another funded, competitive program that is available to graduating seniors:

http://seap.asee.org/program_details

Based on the fact that you were in MOP I’d definitely recommend SPARC: http://sparc-camp.org/

Another good one is Google CSSI if you’re into Computer Science: https://www.google.com/edu/resources/programs/computer-science-summer-institute-cssi/

If you’re Jewish, a very interesting program is the Bessie Lawrence Summer Science Institute, which funds immediate HS grads to go to Israel for 4 1/2 weeks and do science research at the Weizmann Institute.

http://davidson.weizmann.ac.il/en/issi

@renaissancedad ISSI is not related in any way to being Jewish. Very few of the participants are Jewish, and consist of more than 80 students from 19 different countries. Only of few of the 19 American students each year happen to be Jewish. It is a non-religious program.

^ Thank you for the clarification.

http://www.perimeterinstitute.ca/outreach/students/programs/international-summer-school-young-physicists