Software Repos
The following are commonly used package and image repositories:
Docker registry
- DockerHub
 - Amazon ECR Public Gallery
 - Microsoft Artifact Registry
 - Oracle Container Registry
 - Registy at Github
 - RED HAT Quay.io
 
Linux packages
- Linux Packages: Essential Packages for Linux and Unix
 - Ubuntu Packages: All the packages available in the Ubuntu Package archive.
 - RPM Fusion: Provides software that the Fedora Project or Red Hat doesn't want to ship.
 - EPEL: Extra Packages for Enterprise Linux (EPEL)
 - PackMan: OpenSUSE's third-party software source
 - Remi: PHP Repository
 - Gentoo portage: Gentoo Linux repo
 - Fedora copr: Fedora Linux repo
 - Ubuntu Ports: Ubuntu Repositories for Non-x86 Architectures
 - IUS: Repository that provides newer versions of select software for RHEL and CentOS.
 - ATOMIC: Stable free access rpm channel