Popular stencils
Free
Adobe Experience Manager (AEM) Dialogs and Widgets
An Adobe Experience Manager (AEM) AKA Adobe CQ wireframe stencil for creating authoring dialogs.
Free
Ubiquiti
Official iconsets for creating diagrams that include Ubiquiti products.
Free
Facebook Timeline v1.0
A series of stencils for Facebook Timeline Pages, and Timeline Tab Applications.
Free
Traffic Sign
Japanese traffic signs.
Free
git
A template for drawing repository & branch diagrams, based on the figure style in Pro Git.
Free
Flow callouts
Rounded rectangular callouts with semi-transparent gradience.
Free
Floorplans: Appliances
A handy collection of appliances for laying out basic floorplans.
Free
SysML
The last update SysML stencil is available at https://stenciltown.omnigroup.com/stencils/sysml/
Free
Cogs
A simple stencil with two cogs.