Those applying for 2016 entry and those who will be applying for years thereafter need to start checking testing requirements of the the colleges to which they may apply becuase some significant changes are taking place. For example:
Penn: previously required that you take either SAT plus two subject tests or, as an alternative to both of those, the ACT w/writing. Penn now requires either SAT or ACT and recommends but does not require two subject tests regardless of whether you submit SAT or ACT. The ACT essay is no longer required and will not be used if submitted. The SAT essay will not be used for admisison. Effective with the new SAT next year, the optional SAT essay will not be required. See http://www.admissions.upenn.edu/apply/whatpennlooksfor/testing
Princeton: previously required SAT or ACT w/writing, plus two subject tests. Subject tests are now recommended but not required http://admission.princeton.edu/applyingforadmission/admission-faqs/standardized-tests
Yale: like Penn previously required SAT plus two subject tests, or, as an alternative to both of those, the ACT w/writing. Now SAT or ACT w/writing is required and two subject tests are recommended but not required regardless of whether you submit SAT or ACT. As to the new SAT for those intending to apply for entry in 2017 or after, the optional writing section will be required. The exisiting SAT or new SAT w/optional essay will be accepted if applying for entry in Fall 2017, but if you are an upcoming high school sophomore who has already taken the exisitng SAT or intends to to take it in the Fall, be aware it will not be accepted for those applying for entry in Fall 2018. See http://admissions.yale.edu/standardized-testing
Brown and Cornell: effective for entry class of 2017, neither the writing section of the new SAT or the ACT will be required.
George Washington University: has joined the ranks of test optional colleges. http://undergraduate.admissions.gwu.edu/test-optional-policy
Colleges have been provifing College Board with their decision on whether the optional writing section of the new SAT will be required and College Board has started a list https://collegereadiness.collegeboard.org/sat/register/college-essay-policies