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libsecp256k1 is a high-performance and high-assurance C library for digital signatures and other cryptographic primitives on the secp256k1 elliptic curve. It is intended to be the highest quality publicly available library for cryptography on the secp256k1 curve.

RoboSats is a simple and private way to exchange bitcoin. It simplifies the peer-to-peer user experience and uses lightning hold invoices to minimize custody and trust requirements while helping users stick to best privacy practices. Available on the web, Android, Windows, MacOS, and Linux.

YakiHonne is a Nostr web and mobile client for exploring Nostr short-form and long-form content.

Alby Go is a simple Lightning mobile wallet interface for bitcoin payments over the Lightning Network. It works well with Alby Hub or any other Nostr Wallet Connect (NWC) wallets. Available on iOS and Android.

"We are thrilled to announce the release of BTCPay Server 2.0, our most significant update since the project began in 2017," announced the project.

HAVEN is a personal Nostr protocol relay for storing and backing up sensitive notes, such as ecash, private chats, and drafts. It offers features like web-of-trust, inbox relay, cloud backups, Blastr, old note import, and an integrated Blossom media server.

Athenut is a privacy-friendly pay-per-query web search engine powered by Kagi and Cashu.