Top 4 capability-based Open-Source Projects

go-capnp

3 1,152 6.3 Go

Cap'n Proto library and code generator for Go

Project mention: Sandstorm: Open-source platform for self-hosting web app | news.ycombinator.com | 2023-06-04

The Go implementation of capnp is alive and well, too. I highly recommend it: https://github.com/capnproto/go-capnp

awesome-ocap

3 325 4.8

Awesome Object Capabilities and Capability Security

Project mention: JavaScript-Native RPC to Cloudflare Workers | news.ycombinator.com | 2024-04-06

Nice to see more systems architected on object capabilities. It's a more practical security model than ACLs: https://srl.cs.jhu.edu/pubs/SRL2003-02.pdf
Or more succinctly:
> Capability-based security enables the concise composition of powerful patterns of cooperation without vulnerability.
from https://github.com/dckc/awesome-ocap

InfluxDB

www.influxdata.com featured

Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
spec

6 153 4.1

User Controlled Authorization Network (UCAN) Specification (by ucan-wg)

Project mention: OCapN, Interoperable Capabilities over the Network | news.ycombinator.com | 2023-11-16

There's ucan too, which fills some similar-ish roles. It's definitely not quite as comprehensive & featureful as ocapn, but worth mentioning. https://ucan.xyz/

kay

1 19 0.0

A hypothetical message-based programming language inspired by Smalltalk, Self, Erlang, Clojure and sci-fi and biology.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).