Based on our record, Karbon seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Similarly, Karbon (part of the Calligra suite) absorbed the suite's dedicated flowchart tool, and is pretty functional for this purpose, but it's primarily developed for Linux. While they have Windows installers, they're not the easiest to find and aren't directly supported. Source: about 2 years ago
Invision - Prototyping and collaboration for design teams
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
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Balsamiq - Balsamiq. Rapid, effective and fun wireframing software.
Vector Magic - Easily convert JPG, PNG, BMP, GIF bitmap images to SVG, EPS, PDF, AI, DXF vector images with real full-color tracing, online or using the desktop app!