There are several free online resources available to learn CompTIA A+. Here are some popular ones:

1. Professor Messer (www.professormesser.com): Professor Messer offers free video courses specifically for CompTIA certifications. His CompTIA A+ course covers all the exam objectives in detail, and you can also find additional study materials and practice exams on his website.

1. CompTIA A+ Study Groups (certification.comptia.org/training/studygroups/a-plus): CompTIA’s official website hosts study groups where you can connect with other learners preparing for the A+ certification. These study groups provide a platform for discussion, sharing resources, and seeking guidance from experts.

1. Reddit (www.reddit.com/r/CompTIA): The CompTIA subreddit is a community of individuals interested in CompTIA certifications. It’s a valuable resource for finding study materials, asking questions, and getting advice from experienced professionals and fellow learners.

1. YouTube: YouTube has various channels dedicated to CompTIA A+ exam preparation. Some popular channels include PowerCert Animated Videos, ITProTV, and Eli the Computer Guy. These channels provide video tutorials, study guides, and tips for the A+ certification.

1. ExamCompass (www.examcompass.com): ExamCompass offers free practice exams and quizzes for CompTIA A+. These practice tests can help you assess your knowledge and identify areas that need more focus.

1. Cybrary (www.cybrary.it): Cybrary offers a wide range of free IT training, including CompTIA A+. Their A+ course covers the exam objectives through video lectures, virtual labs, and assessments.

Remember that while free online resources can be beneficial, they may not cover all exam objectives in depth or provide the same level of comprehensive content as paid courses or study materials. It’s recommended to supplement your learning with official CompTIA study guides and practice exams to ensure thorough preparation for the A+ certification.