diagrams.net (formerly called Draw.io) is a completely free, open-source, cross-platform and stand-alone flowchart drawing application that can be used as a browser-based web application, desktop application and plug-in for some other software. That's to say, you can use its web edition directly in a web browser (no registration required, no limitations, no catches), or use its desktop edition offline under Windows, Mac or Linux OS.

Acoustica is a very excellent multi-track audio editing tool for Windows and Mac platforms, developed by Acon Digital from Norway. It features dynamic sound processing, real-time noise reduction, format conversion, time scale adjustment, audio equalizer, chorus effects, reverberation effects, etc. To some extent, it can be regarded as a lite edition of Cool Edit Pro.

Vectorworks is a unique and world-leading CAD and BIM software for Windows and Mac Platforms, developed by Nemetschek Group from Germany in 1985. It is widely used by hundreds of thousands of designers around the world in architectural design, landscape design, lighting design, mechanical design, and many other fields. Although less popular than AutoCAD, it is the preferred tool for architectural and product industrial designers in Europe, America, Japan, and other industrialized countries.

Object2VR is a professional and powerful 360-degree interactive panoramic video production tool for Windows and Mac platforms, mainly used for a full range of product display, developed by Garden Gnome Software from Austria. The resulting panoramas can be exported in Flash, HTML5, QuickTime VR, and so forth formats, and played on websites or mobile devices such as smart phones, allowing your photos to be displayed as panoramic videos.

WireframeSketcher is a wireframe, mockup and prototype creating tool for Windows, Mac and Linux platforms, developed by Peter Severin from Romania in 2008. It can help designers, developers and product managers quickly create wireframes, interface models and UI prototypes with hand-drawn styles for desktop, Web and mobile applications.