Conclusion and Personal Opinion
Conclusion:
All educational web sites are nice and compelling, they are complete and their information is correct. Their names are related to their business, all of them using multimedia and their loading speed is good The C++ Tutorial web site has other links which are not related to the tutorial and has some consistency problem.
Personal Opinion:
To me among three web sites Stony Brook has the best web site because of its features, Hofstra and C.W. Post has lots of free space which can be utilized for more information, specially C.W. Post should add more text on its main page.
C++ Tutorial web site needs to be updated as it is not current. Lots of advertisement divert the user's attention and put a negative impression on the user. The page should be properly formatted.