Don’t know if these have been announced on Nostr, but here is the list of semi-finalists from the Nostr Hackathon on bolt.fun. (finalists yet to be announced). Check bolt.fun for project descriptions / URLs.

- Auntie LN: Verified Lightning Nodes on Nostr.

- Colighter: A collaborative web content highlighter, distributed over Nostr.

- Fynstr: Find your niche, find your needs.

- Geyser Nostr: Geysers and ostriches go well together.

- GoodStr: Get value back for what you do.

- Growr Microfinance Protocol: Fair and sustainable microfinance protocol built on top of Bitcoin.

- Nossence: A nostr crawler that promotes best notes and articles.

- Nosta: The antidote for Nostr profile setup anxiety.

- NostrBounties: complete tasks, get paid in bitcoin.

- Nygma: Social recovery of your Nostr private key.

- ONOSENDAI オノセンダイ: Cyberspace client for nostr protocol.

- PLEBHY: Decentralised GIF library on nostr.

- shocknet: Reclaiming the Web with Nostr and Lightning.