consolidated from http://www.codeproject.com/Reference/720512/List-of-Visual-Studio-Project-Type-GUIDs

ASP.NET MVC 1.0	{603C0E0B-DB56-11DC-BE95-000D561079B0}
ASP.NET MVC 2.0	{F85E285D-A4E0-4152-9332-AB1D724D3325}
ASP.NET MVC 3.0	{E53F8FEA-EAE0-44A6-8774-FFD645390401}
ASP.NET MVC 4.0	{E3E379DF-F4C6-4180-9B81-6769533ABE47}
C#	{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}
C# in Dynamics 2012 AX AOT	{BF6F8E12-879D-49E7-ADF0-5503146B24B8}
C++	{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}
Database	{A9ACE9BB-CECE-4E62-9AA4-C7E7C5BD2124}
Database (other project types)	{4F174C21-8C12-11D0-8340-0000F80270F8}
Deployment Cab	{3EA9E505-35AC-4774-B492-AD1749C4943A}
Deployment Merge Module	{06A35CCD-C46D-44D5-987B-CF40FF872267}
Deployment Setup	{978C614F-708E-4E1A-B201-565925725DBA}
Deployment Smart Device Cab	{AB322303-2255-48EF-A496-5904EB18DA55}
Distributed System	{F135691A-BF7E-435D-8960-F99683D2D49C}
F#	{F2A71F9B-5D33-465A-A702-920D77279786}
J#	{E6FDF86B-F3D1-11D4-8576-0002A516ECE8}
Legacy (2003) Smart Device (C#)	{20D4826A-C6FA-45DB-90F4-C717570B9F32}
Legacy (2003) Smart Device (VB.NET)	{CB4CE8C6-1BDB-4DC7-A4D3-65A1999772F8}
Model-View-Controller v5 (MVC 5)	{349C5851-65DF-11DA-9384-00065B846F21}
MonoTouch	{6BC8ED88-2882-458C-8E55-DFD12B67127B}
MonoTouch Binding	{F5B4F3BC-B597-4E2B-B552-EF5D8A32436F}
Portable Class Library	{786C830F-07A1-408B-BD7F-6EE04809D6DB}
SharePoint (C#)	{593B0543-81F6-4436-BA1E-4747859CAAE2}
SharePoint (VB.NET)	{EC05E597-79D4-47f3-ADA0-324C4F7C7484}
SharePoint Workflow	{F8810EC1-6754-47FC-A15F-DFABD2E3FA90}
Silverlight	{A1591282-1198-4647-A2B1-27E5FF5F6F3B}
Smart Device (C#)	{4D628B5B-2FBC-4AA6-8C16-197242AEB884}
Smart Device (VB.NET)	{68B1623D-7FB9-47D8-8664-7ECEA3297D4F}
Solution Folder	{2150E333-8FDC-42A3-9474-1A3956D46DE8}
Test	{3AC096D0-A1C2-E12C-1390-A8335801FDAB}
VB.NET	{F184B08F-C81C-45F6-A57F-5ABD9991F28F}
Visual Database Tools	{C252FEB5-A946-4202-B1D4-9916A0590387}
Visual Studio Tools for Applications (VSTA)	{A860303F-1F3F-4691-B57E-529FC101A107}
Visual Studio Tools for Office (VSTO)	{BAA0C2D2-18E2-41B9-852F-F413020CAA33}
Web Application	{349C5851-65DF-11DA-9384-00065B846F21}
Web Application (incl. MVC 5)	{349C5851-65DF-11DA-9384-00065B846F21}
Web Site	{E24C65DC-7377-472B-9ABA-BC803B73C61A}
Windows (Visual C++)	{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}
Windows Communication Foundation (WCF)	{3D9AD99F-2412-4246-B90B-4EAA41C64699}
Windows Phone 8/8.1 App (C#)	{C089C8C0-30E0-4E22-80C0-CE093F111A43}
Windows Phone 8/8.1 App (VB.NET)	{DB03555F-0C8B-43BE-9FF9-57896B3C5E56}
Windows Phone 8/8.1 Blank/Hub/Webview App	{76F1466A-8B6D-4E39-A767-685A06062A39}
Windows Presentation Foundation (WPF)	{60DC8134-EBA5-43B8-BCC9-BB4BC16C2548}
Windows Store Apps (Metro Apps)	{BC8A1FFA-BEE3-4634-8014-F334798102B3}
Workflow (C#)	{14822709-B5A1-4724-98CA-57A101D1B079}
Workflow (VB.NET)	{D59BE175-2ED0-4C54-BE3D-CDAA9F3214C8}
Workflow Foundation	{32F31D43-81CC-4C15-9DE6-3FC5453562B6}
XNA (Windows)	{6D335F3A-9D43-41b4-9D22-F6F17C4BE596}
XNA (XBox)	{2DF5C3F4-5A5F-47a9-8E94-23B4456F55E2}
XNA (Zune)	{D399B71A-8929-442a-A9AC-8BEC78BB2433}
Xamarin.Android / Mono for Android	{EFBA0AD7-5A72-4C68-AF49-83D382785DCF}
Xamarin.iOS	{6BC8ED88-2882-458C-8E55-DFD12B67127B}