Are there any other programs similar to GoogleCSSI and Microsoft High School Internships for incoming college freshman?

Title says it all.

I got into UW Madison for cs which is ranked #16 for undergrad cs so my school is already set but I want to look for summer opportunities since I slacked off freshman to sophomore summers to just play videogames.

I took the junior year summer to study full stack web development from March and I have a decent resume worth of portfolio projects but I’m not sure where to apply them to.

Many of my friends are getting internships and research postions this year for the summer but they wont tell me how so I’m a bit confused. Is there any list I can refer to for cs summer programs for incoming college freshman?