A random list that will grow, eventually, with time.

Training Kits

Microsoft: https://weblogs.asp.net/ricardoperes/microsoft-developer-training-kits

E-books

Syncfusion

http://www.syncfusion.com/resources/techportal/ebooks/

Microsoft

http://blogs.msdn.com/b/mssmallbiz/archive/2014/07/07/largest-collection-of-free-microsoft-ebooks-ever-including-windows-8-1-windows-8-windows-7-office-2013-office-365-office-2010-sharepoint-2013-dynamics-crm-powershell-exchange-server-lync-2013-system-center-azure-cloud-sql.aspx

Others

http://speckyboy.com/2015/01/12/free-web-design-ebooks-2014/

Videos

ASP.NET

ASP.NET MVC: http://www.asp.net/mvc/videos, http://www.asp.net/mvc/videos/mvc-5

ASP.NET Web Forms: http://www.asp.net/web-forms/videos

ASP.NET Single Page Application: http://www.asp.net/single-page-application/videos

Web API: http://www.asp.net/web-api/videos

Web Pages: http://www.asp.net/web-pages/videos

ASP.NET MVC (Pluralsight): http://www.asp.net/mvc/pluralsight

ASP.NET Web Forms (Pluralsight): http://www.asp.net/web-forms/pluralsight

Microsoft

SharePoint: https://technet.microsoft.com/en-us/library/cc262880.aspx

How do I?: https://msdn.microsoft.com/en-us/bb629407.aspx

SharePoint 2013 training for IT pros: https://technet.microsoft.com/en-us/office/dn756397.aspx

Azure: http://azure.microsoft.com/en-gb/documentation/videos/index/

Entity Framework: https://msdn.microsoft.com/en-us/data/jj590134.aspx

Data (WCF Data Services, Entity Framework, ADO.NET, LINQ to SQL): https://msdn.microsoft.com/en-us/data/videos.aspx

SharePoint Online: https://support.office.com/en-us/article/SharePoint-Online-training-courses-videos-and-tutorials-2eb5e190-1c90-4987-908d-7c2263f40c5e?CorrelationId=ca3182e4-df93-4d45-8f4c-87e558fd1cbb&ui=en-US&rs=en-US&ad=US&fromAR=1

Office 365 Jump Start: https://technet.microsoft.com/en-us/video/office-365-jump-start-01-microsoft-office-365-overview-for-it-pros.aspx

Channel 9

C#: http://channel9.msdn.com/Search?term=c%23

ASP.NET: http://channel9.msdn.com/Search?term=asp.net

SharePoint: http://channel9.msdn.com/Search?term=sharepoint

HTML5: http://channel9.msdn.com/Search?term=html5

SQL Server: http://channel9.msdn.com/Search?term=sql%20server

Azure: http://channel9.msdn.com/Search?term=azure

Office 365: http://channel9.msdn.com/Search?term=office%20365

Entity Framework: http://channel9.msdn.com/Search?term=entity%20framework

Web API: http://channel9.msdn.com/Search?term=web%20api

Microsoft Virtual Academy

C#: http://www.microsoftvirtualacademy.com/training-topics/c-app-development

ASP.NET: http://www.microsoftvirtualacademy.com/training-topics/web-development

SharePoint: http://www.microsoftvirtualacademy.com/product-training/sharepoint

HTML5: http://www.microsoftvirtualacademy.com/training-topics/html5

SQL Server: http://www.microsoftvirtualacademy.com/product-training/sql-server

Azure: http://www.microsoftvirtualacademy.com/training-topics/cloud-app-development

Office 365: http://www.microsoftvirtualacademy.com/product-training/office-development

YouTube

C#: https://www.youtube.com/results?search_query=C%23

ASP.NET: https://www.youtube.com/results?search_query=asp.net

SharePoint: https://www.youtube.com/results?search_query=sharepoint+2013

HTML5: https://www.youtube.com/results?search_query=html5

SQL Server: https://www.youtube.com/results?search_query=sql+server

Azure: https://www.youtube.com/results?search_query=azure

Office 365: https://www.youtube.com/results?search_query=office+365

Entity Framework: https://www.youtube.com/results?search_query=entity+framework

Web API: https://www.youtube.com/results?search_query=web+api