Answer:
No, not necessarily.
SAT prep courses or seminars are very helpful, but not an outstanding item to put on a college application. They're kind of expected of you to do, since you most obviously want to do the very best you can on your SATs. If you want to show proof that you took SAT prep courses, then show it through your test score! :)
As for college summer programs, I definitely recommend going to one and putting it on your application. If you're contemplating about going, I would say go! In my experience, colleges are very favourable to those applicants who have completed summer programs or other activities with them. To them, this shows a lot of interest from you, because you invested your time (and money!) to see and do coursework at their school. Other good points: (1) A lot of summer programs offer college credits for completing a few of their classes (which is definitely impressive to admissions), (2) if you make a good impression during your stay there, an instructor MAY influence admissions to accept you, and (3) some colleges may give you scholarships for participating in their program! The summer program I went to gave two scholarships for this school year. I think all of those points are very impressive to admissions, definitely put it on there if you've been to one!