Bookmarking this to refer back to later, but here are the ones I use all the time:

Web Clients

- Nostrudel

- Primal

- Coracle

- Snort

Specific Content

- Zap.Stream

- Wavlake

- Flare? (Haven't checked it out much yet, but looks good)

Tools

- Advanced Nostr Search

- Shipyard

- Highlighter

- Listr

I know there are way more that I need to try out. Flockstr comes to mind and NsecBunker, though I never could get it to work for me.