VSTO Add-ins (edit)

https://docs.microsoft.com/en-us/visualstudio/vsto/programming-vsto-add-ins?view=vs-2017

https://docs.microsoft.com/en-us/visualstudio/vsto/architecture-of-vsto-add-ins?view=vs-2017

https://docs.microsoft.com/en-us/visualstudio/vsto/create-vsto-add-ins-for-office-by-using-visual-studio?view=vs-2017

Developing Your First VSTO Add-Ins

https://blog.tallan.com/2018/06/26/developing-your-first-vsto-add-in/

Outlook’s slow add-ins resiliency logic and how to always enable slow add-ins

https://developermessaging.azurewebsites.net/2017/08/02/outlooks-slow-add-ins-resiliency-logic-and-how-to-always-enable-slow-add-ins/

Pega for Outlook add-in and Pega for Outlook VSTO add-in comparison

https://community.pega.com/knowledgebase/articles/pega-sales-automation/pega-outlook-add-and-pega-outlook-vsto-add-comparison

Redmine Outlook Add-in

https://www.redmine.org/plugins/redmine-outlook-addin

PowerPoint Add-in for Developer

https://thecolorofcode.com/2019/01/30/howto-create-a-powerpoint-addin-in-c/

https://github.com/robibobi/powerpoint-timer

Outlook Add-in for Developer

https://www.codeproject.com/articles/93288/add-in-programming

https://www.codeproject.com/articles/155283/addon-programming-and-an-outlook-addin2

https://jwcooney.com/2012/05/04/vsto-for-ms-outlook-2007-using-msocontroledit-and-msocontrolcombobox-in-the-commandbars/

https://www.codeproject.com/Articles/31971/Understanding-SynchronizationContext-Part-I

Configuring a Web Server to Allow Excel File Creation via the Interop.Excel Namespace

https://jwcooney.com/2012/09/20/configuring-a-web-server-to-allow-excel-file-creation-via-the-interop-excel-namespace/

AngularJS + Excel VBA as Web Server with REST

https://exceldevelopmentplatform.blogspot.com/2018/03/vba-c-excel-as-web-server-with-rest.html

New in Outlook for developers (09/18/2015)

https://docs.microsoft.com/en-us/previous-versions/office/jj228679(v=office.15)?redirectedfrom=MSDN