Office Hours: (Spring, 2025): I'm usually at the Terrell Library reference desk on Fridays from 12-2. You can also make an appointment with me at my Bookings page
Note: That photo is from 1996 - I look a lot older now ;-)
The grandparent of them all; widely used. $, but WSU users get a big break on the cost (see the link). One-time charge, although you may want to buy an upgrade down the line.
Widely used; free/mium, open source. Save and annotate PDFs, easily site your sources in papers, PowerPoints and more, and make all your sources findable later in a database of you.