Sketchboard.io might be a bit more popular than Dotgrid. We know about 1 link to it since March 2021 and only 1 link to Dotgrid. 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.
Everything else is an SVG. I am using a very cool tool and easy to use called DOTGRID for my svg graphics, you can find it on itch.io. Just be careful with the svgs because when importing you cannot scale them as vectors anymore, so a good rule of thumb is to generate svgs ~1.5-2x and use them at .5 scale so you have some wiggle room to scale them up without losing quality. Source: over 2 years ago
Miro or sketchboard have pretty decent tools for designing your digital whiteboard and creating flowcharts. While still being quite easy to use (and therefore fast to get your ideas out). Source: about 3 years ago
Sketch - Professional digital design for Mac.
Limnu - Sketch, share and collaborate with your team
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Miro - Scalable, secure, cross-device and enterprise-ready team collaboration tool for distributed teams. Join 2M+ users & 8000+ teams from around the world.
YouiDraw - Draw and Design Vector Graphics, Logo, Text, icon in the Cloud.
Draw.Chat - Anonymous real-time whiteboard with text and video chat.