In an ideal world, this page will grow and eventually list all solutions to sicp. Suggested guidelines:
My solutions to the SICP book are available here: https://github.com/abdulapopoola/SICPBook
This repo has resources I used to do the exercises including skeleton files with the exercise prompts converted to multiline scheme comments. My personal solutions for each exercise is on a branch.
repo -- https://github.com/rparnas/sicp-ex/
solutions -- https://github.com/rparnas/sicp-ex/tree/master/exercises
I have solved every exercise (although I cheated where possible, and didn't solve the "Fokker-Planck equation on computational graphs" in the exercise 3.79). https://gitlab.com/Lockywolf/chibi-sicp/-/blob/master/index.org
It's done in a reproducible way in an interactive notebook (org-mode on Emacs), and I have published a paper on Scheme Workshop 2020, with detailed measurements on how much time every exercise took. https://icfp20.sigplan.org/details/scheme-2020-papers/2/Experience-Report-on-Solving-the-Problem-Set-of-SICP-completely-
I have solved as well most of the exercises. I tried to do them in a systematic and explanatory way so others can benefit from using them. https://github.com/ivanjovanovic/sicp