ZoteroBib or BibMe - Interactive Web tools that generate citations using MLA and APA styles.
LearningExpress Library - Provides practice tests, exercises, skill-building courses, eBooks, and information you need to achieve the results you want. (Available via Texshare. Call 214.509.4905 for login information.)
The College Board - Provides registration information for the SAT, as well as free practice questions with detailed explanations, sample essays, a full printable practice test with answers.
Sparknotes - Provides test preparation exercises for the SAT and ACT as well as book summaries.