www-gem

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.

You may find what you need here or there.

Like @a14o@feddit.org I would personaly recommend the power of neomutt and notmuch, but it’s not a GUI option if that’s what you’re looking for.