Links to download pages 

Help Generator - help authoring IDE. Includes the Help Capture tool:

Download Help Generator - help editor and help capture tool

Help Generator + add-in for your development platform

Download Help Generator for Visual Studio.NET  product information
Download Help Generator for Visual Basic 6.0  product information
Download Help Generator for Microsoft Access  product information

Help Capture tool - Generate topic pages directly from any running Windows application. This product is included in the Help Generator - help authoring IDE (above):

Download Help Capture

Animated Gif Recorder - add screen recordings to your help.

Gif Screen Recorder and Editor download

Other - HTML Help Workshop - The help file compiler included in HTML Help Workshop is needed if you want to publish your help as a CHM file:

MS HTML Help Workshop help file compiler.