Developer Tools

1. SharePoint Designer 2013
   MSDN | Video & Articles & Blogs
   MSDN | Developer Documentation
2. Visio Professional
   Required for SharePoint Flowchart Templates
3. Visual Studio
   MSDN Magazine – Filtered by VS
   Videos for Visual Studio
4. Powershell | Wikopedia
5. SharePoint Code; HTML, CSS, AJAX, XSLT, CAML , .NET, JavaScript & Client Object Models.
6. InfoPath – Forms

Resources:
MSDN | SharePoint Developer 2013