The diagrams here were made in SmartDraw, which I’ll talk about soon. It’s not free, but for professional diagrams, it’s one of the most versatile I’ve ever used (and I’ve used a lot). In the week or so I’ve used it, I’ve been able to create complex, professional looking diagrams in 30-60 minutes that might have taken me 2-3 hours in other packages, if they could be made at all and retain their “smart” properties. It still has its flaws, but for my freelance writing, it’s been worth every cent.

I’ll review SmartDraw at length in the future. In the meantime, here are three graph theory diagrams (click to enlarge) that show node connectivity. Feel free to use them for whatever purpose, if they’re of any use to you. I’ll add more complex examples in the future.