https://github.com/rustledger/rustledger I'm building a Rust implementation of Beancount, the double-entry bookkeeping language. It covers the full Beancount syntax, all the booking methods, a BQL query engine, plugins (including rust and python). It works as both a CLI tool and a Rust library, and it compiles to WebAssembly too.

https://github.com/rustledger/rustfava This is a fork of Fava, the web UI that Beancount users know and love, but with the Python parser swapped out for rustledger running as WebAssembly. I packaged it up as a native desktop app using Tauri, so you just double-click to open your ledger files with no terminal or Python needed. It also works via Docker, PyPI, and Nix if that's more your thing.

https://github.com/rustledger/pta-standards I started this project to create proper formal specifications for plain text accounting formats, covering Beancount, Ledger, and hledger. It includes EBNF/ABNF grammars, JSON Schema and Protobuf AST definitions, tree-sitter grammars, Alloy models for invariants, and conformance test suites. The idea is to make it possible for anyone to build a correct, interoperable PTA implementation without reverse-engineering existing tools.

https://github.com/robcohen/peervault This is an Obsidian plugin that lets you sync your vaults directly between your devices over P2P connections, no central server involved. Has S3 fallback if you want. It uses Loro CRDTs so concurrent edits merge cleanly, and Iroh compiled to WASM handles the networking with NAT traversal and end-to-end encryption. Until iroh-docs or iroh-willow comes out with WASM support, this seems to be the best solution for obsidian syncing.