Blockscout is an open-source blockchain explorer for inspecting EVM chains, with support for 1000+ L1s, L2s, L3s, optimistic rollups, and ZK rollups.
Block - Open Source
By collaborating in the open, we create higher quality software, hardware, and protocols through relentless collective examination, and also ensure our systems, hardware, and protocols evolve to meet real-world needs.
outl — local-first markdown outliner & LLM second brain
Open-source bullet-point outliner. Plain markdown on disk (no UUIDs), peer-to-peer tree-CRDT sync that doesn't lose data when devices edit offline — your devices talk straight to each other, end-to-end encrypted, no cloud or third-party server holding your notes — and an MCP server so Claude, Cursor and ChatGPT use your notes as a second brain. A modern Roam, Logseq and Obsidian alternative built in Rust.
Block
Made up of Square, Cash App, Afterpay, TIDAL, Bitkey, and Proto, Block, Inc. builds technology to increase access to the global economy.
Bitcoin Open Roadmap
Public roadmap for bitcoin products and initiatives at Block. See what we’re building, what’s next, and how we’re advancing Bitcoin at Block.
laylavish/uBlockOrigin-HUGE-AI-Blocklist
A huge blocklist of manually curated sites that contain AI generated imagery for uBlock Origin & uBlacklist.
Slices (@slices.network)
AT Protocol App network and SDKs coming soon. quickslice.slices.network https://tangled.org/slices.network/quickslice join the discord: https://discord.gg/NqSd3eW8S8 By @chadtmiller.com
Pragmatic scalable Web3 Storage Design by eskimor · Pull Request #10731 · paritytech/polkadot-sdk
The Parity Polkadot Blockchain SDK. Contribute to paritytech/polkadot-sdk development by creating an account on GitHub.
OpenTimestamps: a timestamping proof standard
OpenTimestamps aims to be a standard format for blockchain timestamping.
On fun simple social building blocks… - Scraps!
Replying to Jared's thoughts on decomposing social media experiences into building blocks (identities, data, interfaces) with some building blocks I'd like to explore in Leaflet!
Awesome Rust Cryptography
Showcase of notable cryptography libraries developed in Rust
GitHub - BlockScience/koi: Collection of KOI related resources and repositories
Collection of KOI related resources and repositories - BlockScience/koi
15 Open-Source Tools for Digital Sovereignty (2026) | Comparisons & Alternatives | Vucense
Own your digital stack. The 15 best open-source tools for privacy, security, and full control over your data — reviewed and ranked for 2026.
For our first launch of the year, we're kicking off with more blocking features! Rolling out today: ATProto across Bluesky, Blacksky, and any other PDS can apply domain blocklists to Bridgy Fed. Blocks come with if you Bounce, and we even added a handy list of reputable blocklists to choose from.
Launch: Domain Blocklists
blog.anew.socialBlockchain
Yes, I know. Not a lot of love for what has happened to blockchains, but it's not all bad.
cycles.money
