Thanks for pointing out the Visio donation, Gary. I'm excited to see the new features in Visio 2010, particularly the online components (PROTIP: If you request Visio now, you'll be able to get the upgrade through Software Assurance).
firstgentrekkie, I have a big soft spot for Dabbleboard too. I even wrote a blog post about it last year. I chose not to include it in the article because I think it's a slightly different class of tool than the ones in the article. At least for me, I consider it more a tool for whiteboarding and brainstorming in meetings than for more permanent-ish diagrams. But obviously that's a distinction with a whole lot of gray area.
And speaking of that gray area, I got a tweet this morning from Daniel McQuillen, creator of a new diagramming app called SimpleDiagrams. There's a free version with a few missing features and a $19 paid version. Aside from the low price, how Daniel really differentiates his product from the rest of the market is in its decidedly "non-professional" look and feel. Here's a useful diagram I spent about 30 seconds making.
Since it's a new product, SimpleDiagrams still has some kinks, but it's one I'm definitely going to keep an eye on. The paid version enticingly includes an "export to Basecamp" option. Also interesting, SimpleDiagrams saves its files as XML, which makes me wonder how it would fare in version-control systems.
Finally, I wanted to let you all know that last week I blogged about free and cheap alternatives for building charts. As I said in the blog post, it never fails to amaze me how many truly poor charts I see in fundraising letters, even from nonprofits that should know better.
Cheers,
Elliot