Diagrams as code
We're seeing more and more tools that enable you to create software architecture and other diagrams as code. There are benefits to using these tools over the heavier alternatives, including easy version control and the ability to generate the DSLs from many sources. Tools in this space that we like include Diagrams, Structurizr DSL, AsciiDoctor Diagram and stables such as WebSequenceDiagrams, PlantUML and the venerable Graphviz. It's also fairly simple to generate your own SVG these days, so don't rule out quickly writing your own tool either. One of our authors wrote a small Ruby script to quickly create SVGs, for example.