Is there software that can document source code with Rich Text or HTML without modifying the source file?

Question

Is there software that can add rich text or HTML comments to specific lines and sections of text-based source code files without modifying the source file?

I am looking to document some HP Basic software and the only program I can find is Microsoft Word. The Review pane allows me to tag comments to specific lines, but Word comments do not support inserting pictures. Furthermore, Word does not syntax highlight the code, making it difficult to read.

It seems software capable of this should exist, but I am just not searching for the proper buzz words.

Answer 1

Whats the use in not embedding the comments in the source file? Might "code folding" be the keyword you are looking for?

Answer 2

There are various code review tools like Review Board and Code Collaborator that allow you to collaboratively annotate code for the purposes of review and approval.

I don't believe either of them support annotating with images but they both have a good commenting system and provide syntax highlighting and change diffs.

They are, however, geared towards code review rather than documentation, if documenting the code is your intent here then you might be better off with something like Doxygen that allows you to add comments to your code and will then genetate documentation for you.