www-gem

You’ve just entered a rabbit hole that will push the boundaries of your control on your system.
Now, I’m not 100% sure that I’ve correctly understand what you’re looking for. If you’re after a file manager for nvim or tmux, then I would second yazi for your terminal as previously mentioned. Or you could go bare bone and use the command line straight with the help of some features like zsh and its competition, call to past arguments, zmv (and glob expression)…
For nvim, you can use the default tree explorer for basic usage. More advanced features can be found with telescope for example. I personaly opted for fzf-lua. Both can be used in other plugins as well to make things very easy and powerful. Just to cite a few, I’m using fzf-lua with obsidian (which, despite the name, doesn’t require the tool of the same name) and snacks.

I was about to suggest the framework as well, but I don’t have to :)
I would just add that the build quality is at least equal to any mainstream brand like Dell or Lenovo, and you also gain in repairability/upgradability which will make this laptop last forever (every single piece is replaceable) or upgradable for a fraction of the price of a new laptop.

I wrote a first impression and 2.5 months review if you’re interested.

Didn’t hear of pimsync before. Thanks for sharing.
I don’t think I’m ready to switch yet based on its current limitations, but I’ll definitely keep an eye on it.

I’ve tried a few options, but I’ve stuck with khal for years now.
It works smoothly [1], supports multiple calendars, syncs with vdirsyncer (details in its documentation), and provides both CLI and TUI interfaces that make events easy to see, edit, and manage.

The CLI interface is especially handy for integrating khal with other apps like neomutt and taskwarrior for example. For instance, I have a keybinding that lets me export calendar invites from neomutt directly into khal. There’s also a list of tools (including one for khal) listed in the neomutt documentation if you’re curious.

I use it to manage both my personal and professional calendars, syncing them bidirectionally with vdirsyncer. The only drawback I’ve encountered is that some commands can be a bit cumbersome—but I solved this by writing my own script to make khal’s commands more intuitive for my workflow. That flexibility could be seen as another strength of khal ;)

[1] That’s my experience, but others here have reported it can be slow in some cases.