good tool to draw diagrams?

[Altera_Forum]

Hi all, in all Altera documentation (Quartus, Embedded IP, other tools), Altera uses a neat software package that they use to draw everything.  

 Does anyone know what it might be? Or would anyone be able to suggest a professional software package that can be used to produce similar schematics?  I attached an example, but anything recommendations on something similar that is easy to use and produces good results would be great!  Thanks!

[Altera_Forum]

You can get pretty close to that using Visio.

[Altera_Forum]

I use Visio. It's easy to embed in Word documents and the like.

[Altera_Forum]

Visio works for me. I assume altera just have some libraries in visio. 

If you want nice looking waveforms, use http://wavedrom.com/

[Altera_Forum]

Thanks all. I use Visio too, I was just wondering if there were a better tool with a developed object library for chip systems.