Large Universities 

Boston University

Emory University

New York University Arts & Science (Requires either the SAT or 3 SAT Subject Tests or ACT with Writing or the IB Diploma or 3 IB higher-level exam scores)

Northeastern University

Penn State University

State University of New York (Only Stony Brook recommends 3 SAT Subject Tests)

Syracuse University (SAT/ACT is also optional for students studying outside the United States AND not enrolled in a school that follows the American education system)

Texas Christian University

University of California (Most UC's do not require Subject Tests but they are recommended if you are applying to Berkeley's College of Chemistry or College of Engineering, most of Irvine's schools, UCLA's Henry Samueli School of Engineering and Applied Science, Riverside's College of Natural and Agricultural Sciences and Bourns College of Engineering, San Diego's Jacobs School of Engineering and biological or physical sciences majors, Santa Barbara's College of Engineering and College of Creative Studies) 

University of Illinois at Urbana-Champaign

University of Michigan

University of Maryland

University of San Francisco

University of Southern California (optional but recommended)

University of Washington

University of Wisconsin-Madison

Medium Universities

American University, DC

Boston College

Brandeis University

Chapman University

College of William and Mary (optional question)

Fordham University

George Washington University

Lehigh University

Loyola Marymount University

Santa Clara University

Vanderbilt University

Washington University in St. Louis

Small Universities 

Bennington College (SAT and Subject Tests optional) 

Bowdoin College (Even SAT/ ACT is optional)

Bucknell University 

Claremont McKenna Universitye

Clark University

Colby College (Requires either the SAT or 3 SAT Subject Tests in three different subject areas or ACT)

Colgate University

Denison University

Hampshire College

Franklin and Marshall

Grinnell College 

Macalester College 

Middlebury College

Oberlin University

Pitzer College

Sarah Lawrence College (does not require SAT either)

Scripps

Smith College

Skidmore College