Aside from the addons that come with blender (F2, Edge/ Loop/ Mesh/ Curve Tools, Node Wrangler, Import Img as Plane, Amaranth, etc.. ) I really like these for making simple tasks much easier:
Image Paste lets you paste an image from the copy buffer as a textured plane or image empty etc..
Waveform Display displays the amplitude of any imported waveform (present in the VSE) in the dope sheet. Really useful when you're animating with sound.
Sync Workspaces allows you to synchronize certain viewport settings across different workspaces. Must have!
Bulk Asset Tools for easier asset and catalog management without the need to open the respective asset files manually, if you want to sort and rename them.
Blender Launcher Not really an addon, but great if you want to download and organize different builds (no Mac version though)
a little off-topic, but I've noticed that it is impossible to comment here unless you specify the language in the dropdown. Maybe a bug on lemmy.world? (I'm on a different instance) It just shows you the 'wait for it' circle and everything you typed is gone once you hit cancel.
now guess which letter....