Innovasys HelpStudio is described as 'HelpStudio is the fastest, easiest way to create and publish help systems and integrate them with your desktop or web based applications or components, including .NET'. There are more than 10 alternatives to Innovasys HelpStudio for Windows, Online / Web-based, PortableApps.com and The Portable Freeware Collection. The best alternative is HelpNDoc . It's not free, so if you're looking for a free alternative, you could try Vole Media CHM Free Edition or KEL CHM Creator. Other great apps like Innovasys HelpStudio are WinCHM (Paid), HelpScribble (Paid), CHM Editor (Paid) and Abee CHM Maker (Freemium).
Vole Media CHM Free Edition lets you create standard and edit CHM with ease. Since CHM is totally supported by Microsoft Windows. Readers don’t need install any software can open and read CHM file. This software is 100% Portable.
WinCHM - Help authoring software (CHM,WebHelp,Single HTML - Word, PDF) WinCHM is a very easy-to-use help authoring tool. Not needing to learn too much, you can be master of creating HTML help(CHM), Web help, PDF manual and Word documents.
CHM Maker can easily make chm-files. CHM-files can store many html-pages in one file. It is more convenient to store one file instead a lot of independent html-pages. This program has unique features which you will not find in the other chm-making programs.