State Machine Workflows

http://www.codeproject.com/KB/WF/JumpStartMF.aspx

http://msdn.microsoft.com/en-us/library/ms734766(v=VS.90).aspx

http://visualstudiogallery.msdn.microsoft.com/en-us/7fe6f504-a58d-456e-8f55-e64bddc81a41

SharePoint Power Pack for UI Developers

http://www.sharepointdesignerstepbystep.com/default.aspx

Authentications

20 steps to get together Windows Authentication, Silverlight and WCF service

http://rouslan.com/2009/03/20-steps-to-get-together-windows-authentication-silverlight-and-wcf-service/

LDAP

http://blog.algoworks.com/archives/tag/openldap-and-ldapsoft-admin-tools 

NTLM

http://en.wikipedia.org/wiki/NTLM

Kerberos

http://en.wikipedia.org/wiki/Kerberos_(protocol)

Visual Studio Gallery

Visual Studio Learning Pack

http://visualstudiogallery.msdn.microsoft.com/en-us/2A06FB8C-C2B1-417B-9F7D-57254D74905E

WCF Load Test

http://visualstudiogallery.msdn.microsoft.com/en-us/A86305F1-D179-4D3D-800B-A545535CAB6E

Visual WebGui Web Applications Development Tools

http://visualstudiogallery.msdn.microsoft.com/en-us/c271042d-3abe-403c-a371-6c99fbac5b7d

Image Insertion

http://visualstudiogallery.msdn.microsoft.com/en-us/793d16d0-235a-439a-91df-4ce7c721df12

MVVM Training

http://visualstudiogallery.msdn.microsoft.com/en-us/3ab5f02f-0c54-453c-b437-8e8d57eb9942

Productivity Power Tools

http://visualstudiogallery.msdn.microsoft.com/en-us/d0d33361-18e2-46c0-8ff2-4adea1e34fef

Multi Column Collapsible Tree List - Silverlight

http://visualstudiogallery.msdn.microsoft.com/en-us/86738cc3-ed04-4283-9134-eb9131733d0a

Favorites Menu for Visual Studio

http://visualstudiogallery.msdn.microsoft.com/en-us/00F3B972-CB54-47F2-AC56-B2F48C77A74D

Xaml Styler

http://visualstudiogallery.msdn.microsoft.com/en-us/d6634d0e-38fb-48b6-829f-dadbc5c2fb62