SanDriLa - SDL/MSC/UML2 Visio Add-on (V4.4.2.0 last updated 28th April 2008)
Visio Super Utilities (V2.2.0.0 last updated 30th April 2008)
Most Recent Stencils for Visio (V1.2.1.1 last updated 3rd April 2008)
Gane Sarson DFD for Visio (V2.1 last updated 30th April 2008)
Electrical stencils for Visio (V1.9 last updated 1st May 2008)
Bow Tie Diagrams for Visio (V1.2 last updated 9th November 2007)
Protocol stack stencil for Visio (V1.2 last updated 26th June 2007)
JSD for Visio (V1.7.0.0 last updated 19th April 2008)
SSADM for Visio (V2.1 last updated 30th April 2008)
TTCN for Visio (V2.5.0.2 last updated 19th April 2008)
Occam stencil for Visio (V1.1 last updated 11th February 2007)
PEST and SWOT templates for Visio (V1.1 last updated 16th March 2008)
Diacrit - Easy Unicode characters for any Microsoft Windows application (V4.4.0.1 last updated 2nd April 2008)