The portable version of OpenBSD's OpenSSH

https://www.openssh.com/portable.html

TLSv1.3 capable SSL and crypto library

https://www.openssl.org/

TLSv1.3 capable SSL and crypto library

https://www.openssl.org/

TLSv1.3 capable SSL and crypto library

https://www.openssl.org/

API and interchange format for editorial timeline information

https://github.com/PixarAnimationStudios/OpenTimelineIO

UPS daemon for some Belkin UPS's

http://frmb.org/openupsd.html

Development header files for OpenVanilla

https://openvanilla.org/

Tools for storage and manipulation of sparse volumetric data

https://www.openvdb.org/

Secure IP/Ethernet tunnel daemon

https://openvpn.net/community/

Optimizer for PNG files

http://optipng.sourceforge.net/

IETF audio codec

https://opus-codec.org/

Opus playback library

https://opus-codec.org/

Oracle 8 client

http://www.grosbein.net/freebsd/oracle/

Geometric sans-serif typeface intended for display purposes

https://github.com/theleagueof/orbitron

Library and toolset to operate arrays of data

https://gstreamer.freedesktop.org/projects/orc.html

Scriptable screen reader

http://live.gnome.org/Orca

Real-time Transport Protocol (RTP) library

https://www.linphone.org/technical-corner/ortp.html

Implementation of the UNIX 6th Edition shell

http://v6shell.org/

COIN-OR Open Solver Interface, an API for calling solver libraries

https://projects.coin-or.org/Osi/

Osinfo database files

https://libosinfo.org/

Tools for managing the osinfo database

https://libosinfo.org/

ISO-C API and CLI for generating Universally Unique Identifiers

http://www.ossp.org/pkg/lib/uuid/

Vulnerability scanner written in Go which uses the OSV database

https://github.com/google/osv-scanner

Show you font info and add new 'name' and 'cmap' tables

https://sourceforge.net/projects/oto/

OpenType Sanitizer

https://github.com/khaledhosny/ots

Browser based on Qt 5

https://otter-browser.org/

Detects publicly disclosed vulnerabilities in project dependencies

https://jeremylong.github.io/DependencyCheck https://www.owasp.org/index.php/OWASP_Dependency_Check https://jeremylong.github.io/DependencyCheck/dependency-check-cli/

Plasma5 Oxygen font family

https://cgit.kde.org/oxygen-fonts.git

The Oxygen icon theme for KDE

Library for loading and enumerating of PKCS#11 modules

https://p11-glue.freedesktop.org/p11-kit.html

Perforce command line client

https://www.perforce.com/products/helix-core

Proxy server for 2ch.net

https://github.com/yama-natuki/2chproxy.pl

Module for merging hierarchies using the C3 algorithm

https://metacpan.org/release/Algorithm-C3

Perl interface to compute differences between two objects

https://metacpan.org/release/Algorithm-Diff

Detect and get configuration setting for SDL

https://metacpan.org/release/Alien-SDL

Perl extension for/to use Moose or Mouse modules

https://metacpan.org/release/Any-Moose

Provide framework for multiple event loops

https://metacpan.org/release/AnyEvent

Communicate with the i3 window manager

https://metacpan.org/release/AnyEvent-I3

Compile a log format string to perl-code

https://metacpan.org/release/Apache-LogFormat-Compiler

Get, unpack, build and install modules from CPAN

https://metacpan.org/release/App-cpanminus

Perl module for reading configuration files

https://metacpan.org/release/AppConfig

Simple CPAN package extractor

https://metacpan.org/release/Archive-Any-Lite

Generic archive extracting mechanism

https://metacpan.org/release/Archive-Extract

Perl module for creation and manipulation of tar files

https://metacpan.org/release/Archive-Tar

Create, manipulate, read, and write Zip archive files

https://metacpan.org/release/Archive-Zip

Diff two arrays

https://metacpan.org/release/Array-Diff

Perl5 NTLM authentication module

https://metacpan.org/release/NTLM

Perl5 module for SASL authentication

https://metacpan.org/release/Authen-SASL

Simple authentication framework

https://metacpan.org/release/Authen-Simple

Simple Passwd authentication

https://metacpan.org/release/Authen-Simple-Passwd