Tool for VHDL/Verilog code documentation

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Thank you for your answers (Tricky, PietervanderStar).

So there is no other popular solution to document projects apart from writing word documents?

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Some people use libreoffice (because it's free).

This is a cool website for drawing wave diagrams:

http://wavedrom.com/

Use Visio for other diagrams.

Documentation is engineers bugbear. They hate creating it, and hate it when other engineers havent created it.