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ClassMarker - The ClassMarker online testing website, is a professional, easy to use, online quiz maker that marks your tests and quizzes for you. Create online quizzes free quiz maker. Web-based online testingWeb-based online testing service | Free quiz maker.
Notify OSD - Canonicals on-screen-display notification agent, implementing the freedesktop.
Wooclap - A web-based platform that helps teachers boost participation and measure the level of understanding of students' in class thanks to smartphones.
Notifu - Notifu, a free open source pop-up balloon utility