QuizStar is a free online tool that allows teachers to create quizzes and assign them to students. It instantly grades quizzes and notifies students of their scores. Strengths are that it's free, allows different quiz types, and includes multimedia. Weaknesses are that students don't need to be present to take exams and require an internet connection. Dropbox is a free cloud-based storage system. It can be used to share files between teachers and students or for students to access course materials from any computer. Strengths are that it's free, allows file synchronization, and works across platforms. Weaknesses include needing constant internet access and potential for files to be hacked due to cloud storage.