Qtnp is program for math\physics teachers and students. There 4 tools: Pen, Line, Jogged line, and Circle. The software can draw grids, coordinate planes, and graphics. It has flexible settings, presentation mode, support for all base formats, a GUI for blackboards/tablets, and a built-in powerful calculator.
Calligra is an integrated suite of applications that cover office, creative, and management needs. It offers applications on both desktop computers and mobile platforms like tablets and smartphones. OpenDocument Format (ODF) is used, making it compatible with OpenOffice.org, LibreOffice, and Microsoft Office. Calligra Suite contains the following applications: Calligra Words (word processor), Sheets (spreadsheets), Stage (presentations), Flow (diagrams and flowcharts), Kexi (visual database creator), Braindump (note taking), Plan (project management), Krita (drawing), and Karbon (vector graphics).
SlideShoQ is PDF presentation software that supports two-screen presentations: One screen shows the current slide fullscreen, i.e. what you want to show on the projector for the audience; the second screen is your computer, which shows the current, next, and previous slides, current time, and other useful information.
Orbiview 3D Product Viewer is Flash software for 3D product or model viewing and presentation. It lets visitors view an object with the ability to rotate it 360 degrees. The 3D product viewer is especially useful for product designers and design agencies or manufacturing companies.