Is there an alternative to Everything [1](file search with immediate results) and Ditto [2](clipboard manager) among those you've listed ? I can't live without them on Windows to be honest.
I like that Process Hacker has broader set of features, but what I am missing compared to Process Explorer is the the ability to quickly identify the process by using the "sniper" and the integration with VirusTotal.
I wish there was a single tool with all the bells and whistles :) Maybe I should start contributing to FOSS.
My guess is that they're not included due to internal politics. They were developed by Russinovich before he joined of Microsoft. I believe he mentioned in an interview that he used some undocumented windows APIs and that some Microsoft engineers were not happy about that.
BTW another great diagnostics tools for Windows that I've come across is the Windows Performance Analyzer. One needed to install it separately before, not sure about that nowadays.
The creator of these tools used to give those really cool "The case of the unexplained" presentations where he used the tools to diagnose and fix real-life Windows problems.
Although they don't contain a registry editor, the Windows Sysinternals tools from Microsoft have some great ones like Process Explorer (task manager replacement), Process monitor (shows all real-time Registry activity as well), ZoomIt (great for screen drawing during presentations) and so on. Written by Azure's CTO way before the cloud existed :)
The guy from "Aging Wheels" at YouTube, who by the way is a former software engineer, has a second woodworking channel channel called "Under Dunn". The last video was about a DIY Centrifugal Dust Separator [1]. It was a pretty cool video.
[1] http://www.voidtools.com/support/everything/ [2] https://github.com/sabrogden/Ditto/wiki