A variety of tools, controls, libraries, downloads, and general whatnot that I've found useful, or found a need to produce, over the years. Generally speaking, what's here isn't provided with source code. I hope you still see it worthwhile.

Tools I've Written

CCRP High-Performance Timer Library
I'm happy to say, this is one that's become a classic. A real pleasure to have written. It's in use by many thousands of corporations, government agencies, and just plain folks. Follow the link above to find out more about this 1ms resolution multimedia timer library "written with and for Classic VB."
Console Clipboard Utilities
Simple little tools that read and write the Windows clipboard from the console. They accept standard input, and write standard output, so you can use them with pipes and redirection. 
vbMarkUp Utility
This is the tool I use to colorize "VBish" code that I post here on this website. It's also useful for printing colorized code, via (for example) pasting it into Word. I've made an online demo of this tool available for you to try. It's useful for creating colorized code suitable for printing, but probably not for republishing on the web. The standalone tool is more suited to that.

Other Stuff You Should Have

I'm sure that had Microsoft continued the ClassicVB product line, they ultimately would've included the features offered by this add-in. My favorite is the ability to compile a native console application. If you combine this add-in with the drop-in console support module I wrote, you can have one of the coolest features of VFred right within the ClassicVB IDE. But there's lots more to vbAdvance than just this. And now, after being "off the market" for a couple years, Peter Young has graciously allowed me to host it here. Please note that this is no longer a commercial product, but unsupported freeware. Get it!
This one is the original; the classic. If you want to step into subclassing easily, here's how to get going. Quite a number of the samples provided on this site either use MsgHook directly, or were prototyped with it. There's just no simpler way to start hooking window messages safely.
Here's the best solution I'm aware of to gain full mouse wheel support in all the Classic VB IDEs (VB6, VB5, and VBA), as well as any other application windows that lack such support. This one works in both halves of the IDE code window, and in all NT-class operating systems (both 32- and 64-bit).
This file originally shipped with one of the VB4 betas, back in 1994, and I've been modifying it bits and pieces at a time ever since. I take no credit, or responsibility, but I do think it's a little more useful than what comes on the product CDs. Seems a few others do too, given the downloads. Zipped, it's 164K.

Microsoft Provided

Visual Basic 5 Runtime
Msvbvm50.exe is a self-extracting file that installs the latest versions of the Microsoft Visual Basic run-time files that all applications created with Visual Basic 5.0 need in order to run. The files include fixes that ship with Visual Basic 5.0 Service Pack 3. For more information, see Knowledge Base Article 180071.
Visual Basic 6 Runtime
Vbrun60sp5.exe is a self-extracting executable file that installs versions of the Microsoft Visual Basic run-time files required by all applications created with Visual Basic 6.0. The files include the fixes shipped with Visual Studio 6.0 Service Pack 5. For more information, see Microsoft's download page.
Microsoft Controls and Components for VB5 & VB6
These files were originally provided on Microsoft.com, but my gut tells me they'll become harder and harder to find as time goes on.