Boxes, arrows, icons, and the words around them
The everyday half of the board — shapes and arrows, stickies and callouts, headings, containers, and a 208-glyph monoline icon library that matches the rest of the app.
Engineers sketching
Servers, queues and databases that look deliberate, ten minutes before the design review.
Facilitators
Stickies, columns and callouts — the workshop furniture, without a template to pick first.
Anyone writing a doc
One clear diagram, exported as SVG, that does not look like it came from a different decade.
Why the plain board still matters
Because most boards never become a notation, and they were never trying to. A box, an arrow, a sticky that says "ask Maya" — that is a real use of the tool, not a warm-up for the serious one.
What makes those boards worth keeping is consistency. When every icon is drawn on the same grid at the same weight, an architecture sketch reads as one thought instead of three clip-art packs stapled together.
And when the sketch turns out to matter, it is already on a canvas that speaks UML — so it hardens in place instead of being redrawn somewhere more official.
Start from whatever you have in mind
Every card opens a board with those tools ready to go.
The icon browser
And the shape set beneath it, same grid:
Also on the same board
Open a blank board
Free, no install, no credit card. Bring the team when you're ready.
Start diagramming — free