Software

Core Operating System Stack (CCE)

NixOS is used to declare a Linux desktop and Wobserver
Emacs is a programmable application environment with a text editor built in
i3wm is simple enough. I used EXWM but it might be Software Too Powerful for Mortals.
Evil Mode gives me text-interaction powers that are tough to beat, modal standard which is flexible and applicable to spaces outside of text editing.
Syncthing makes sure that important data is in-sync and in-place.
A Basic Firefox Installation with some customisation is nearly a suitable user agent.

Syncing Maildirs with mbsync is hard and brittle, but better than anything else
Gnus (with evil-mode bindings) is powerful and easy to use
Universal Aggregator provides a way to feed information in to Gnus, be it RSS or twitter feeds, or whatever. Extending it is as trivial as writing a program which emits JSON objects and manages to keep its state enough to not repeat object IDs.
Adaptive Scoring is important. user-transparent machine learning and a pattern that more systems can use. This is only implemented in Gnus but I have a sketch of Decoupled Adaptive Scoring that I would love to see exist some day.
Wallabag captures articles and makes them available on mobile and KOreader Tablet where KOReader Notes can be extracted in to my Knowledge Base.

It's a blogging platform
It's a computational notebook
It's a task-tracking app which can notify you and inform you of what work is pending and important.
It's a text format with a powerful API
It's an eco-system of simple applications which all operate on the same text format.
It's a programmable Hypermedia document format

Dell R410 server hosted at the Westin building exchange by Wobscale
Home-built desktop running Windows for Gameing
NixOS on the Framework Laptop
Cosmo Communicator (bricked) -> Moto G -> Astro Slide by Planet Computers (soon)

3d-printed Trackpoint Corne or atreus with trackball – some custom Mechanical Keyboard
Linux mobile handheld with a hardware keyboard addon¹
Dual-screen laptop like Yoga Book or Surface Neo as the perfect e-reader for textbooks and PDF papers
- simple to use a usb mechanical keyboard in this context!