We did some research on the web, and summarized the great free stuff for ACT Preparation, hope it is helpful.
- ACT Guide from ACT Inc, the one who makes ACT.
- ACT Practice questions from ACT Inc, the one who make ACT.
- Kaplan, the famous test prep provider offers a free, on-line practice ACT exam for registered users, registration is free.
- ACT online practice from 4tests.com
- Test Prep Review provides free self assessment module quizzes.
- Number2.com offers personal ACT Companion Prep Course. Need to sign up but it is free.
- ACT Question of the Day from number2.com
- Peterson’s FREE ACT Practice Test
- Free Video ACT Tutoring
- SAT/ACT Math Reasoning is for FREE ACT Test Preparation from algebra.com
- Word of the Day is for vocabulary skill building from number2.com