I've tried few options like draw.io, creately, gliffy, etc.
I want to know which tool your engineering team is using and how is it better than others?
For my own use, I use pen and paper (for program design/brainstorming) and Inkscape if I need to have a diagram in a document (occasionally I use emacs' artist mode and ditaa for fun, too). At work, we use (org-wide) LucidCharts, which is decent enough at what it does (online diagramming tool with good collaboration abilities, can be embedded easily)
you can use dia on linux, or graphviz (if you configure),
here the gallery <a href="http://www.graphviz.org/Gallery.php" rel="nofollow">http://www.graphviz.org/Gallery.php</a>
Here are few tools I found -<p>Gliffy - gliffy.com<p>Draw.io - draw.io<p>Creately - creately.com<p>RealtimeBoard - realtimeboard.com<p>LucidChart - lucidchart.com<p>Bubbl - bubbl.us<p>Textografo - textografo.com<p>Smartdraw - smartdraw.com<p>Edrawsoft - edrawsoft.com<p>Microsoft Visio<p>I've not used all of them. Looking for suggestions (preferably free tool).