draw.io - Online diagramming application
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Pingboard - Pingboard is the employee experience suite for growing companies that put their people first.
LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
yEd - yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.
JustSift.com - Powerfully simple people search, dynamic org charts, and more. Equip your teams with the fastest tool to uncover and leverage talent in your organization.