Add validation methods to ActiveModel for validating dates and times

https://github.com/adzap/validates_timeliness

Introspectable Version module

https://gitlab.com/oauth-xx/version_gem

Fast sorting of version strings

https://github.com/github/version_sorter

View components for Rails

https://github.com/github/view_component

Library to gather memory, cpu, network, load avg and disk information

https://threez.github.io/ruby-vmstat/

Adds custom processing for warnings

https://github.com/jeremyevans/ruby-warning

Debugging tool for your Ruby on Rails applications

https://github.com/rails/web-console

WebFinger client library

https://github.com/nov/webfinger

HTTP server toolkit

https://github.com/ruby/webrick

WebSocket protocol handler with pluggable I/O

https://github.com/faye/websocket-driver-ruby

Generic extension manager for WebSocket connections

https://github.com/faye/websocket-extensions-ruby

Ruby whois library

https://whoisrb.org/ https://github.com/weppos/whois

Ruby parser for the MediaWiki markup language

https://github.com/nricciar/wikicloth

Provides a way to look up Windows NTSTATUS and Win32 Error Codes

https://github.com/rapid7/windows_error

Library for Windows Remote Management

https://github.com/WinRb/WinRM

Library for Ruby objects with Publish-Subscribe capabilities

https://github.com/krisleech/wisper

Execute code with env variables

https://github.com/mhs/with_env-rb

Lightweight utility over win32ole for accessing basic WMI

https://github.com/opscode/wmi-lite

Ruby interface to the X API

https://sferik.github.io/x-ruby/ https://github.com/sferik/x-ruby

Ruby take off of p5-XML-Simple

https://github.com/maik/xml-simple

Ruby take off of p5-XML-Simple

https://github.com/maik/xml-simple

Ruby standard library package 'xmlrpc'

https://github.com/ruby/xmlrpc

Streaming JSON parsing and encoding library for Ruby

https://github.com/brianmario/yajl-ruby

Efficient and thread-safe code loader

https://github.com/fxn/zeitwerk

Ruby Unit Testing Utility

https://github.com/seattlerb/zentest

Experimental Rust compiler front-end for IDEs

https://rust-analyzer.github.io/

Create bootstrap compilers for building lang/rust

https://www.rust-lang.org/

Generate C bindings from Rust code

https://github.com/mozilla/cbindgen

C99 implementation of the TLS/SSL protocols

https://github.com/aws/s2n-tls

Subset of a well-known texture compression scheme

https://github.com/divVerent/s2tc/wiki

FUSE filesystem that uses Amazon S3 as a backing store

https://github.com/archiecobbs/s3backer

FUSE-based file system backed by Amazon S3

https://github.com/s3fs-fuse/s3fs-fuse

Virtual file system for sandboxing

https://github.com/bazelbuild/sandboxfs

Wrapper around libsass

https://libsass.org/

Build tool for Scala projects

https://www.scala-sbt.org/

Scala Programming Language

https://www.scala-lang.org/

Small man page generator

https://git.sr.ht/~sircmpwn/scdoc

SCReenshOT - command line screen capture utility

https://github.com/resurrecting-open-source-projects/scrot

Set color temperature (sct) daemon

https://github.com/amir/sctd

High-level C++ D-Bus library

https://github.com/Kistler-Group/sdbus-cpp

"Simplified" DocBook XML DTD

https://www.oasis-open.org/docbook/xml/simple/

Open source implementation of a 16bit X86 BIOS

http://www.seabios.org

Minimal seat management daemon and universal library

https://git.sr.ht/~kennylevinsen/seatd

Distributed Object Store and Filesystem

https://github.com/seaweedfs/seaweedfs/wiki

Filesystem in userspace with transparent encryption and decryption

https://github.com/netheril96/securefs

Checks installed packages for vulnerabilities

http://github.com/laffer1/security-advisory-client/

Scaling, colorspace conversion, and dithering library

https://github.com/sekrit-twc/zimg

Perl-script to send xmpp (jabber) messages

https://sendxmpp.hostname.sk/

C library for RDF syntax

https://drobilla.net/software/serd

Wrapper library around CGAL for PostGIS

https://oslandia.gitlab.io/SFCGAL/