Awesome list of linux package search databases
- https://release-monitoring.org (Anitya)
- https://repology.org
- https://pkgs.org
- https://apps.fedoraproject.org/packages
- https://github.com/whohas/whohas
- Snap: https://snapcraft.io
- Appimage: https://appimage.github.io/apps/
- FlatPak: https://flathub.org
- Exherbo: https://git.exherbo.org/summer/
- Linux-Apps: https://www.linux-apps.com
- RPM: http://rpm.pbone.net
- Alpine: https://pkgs.alpinelinux.org/packages
- Arch: https://www.archlinux.org/packages/ and AUR: https://aur.archlinux.org
- Gentoo: https://packages.gentoo.org and https://paludis.exherbo.org
- Ubuntu: https://packages.ubuntu.com and PPA: https://launchpad.net/ubuntu/+ppas
- Debian: https://packages.debian.org
- Mint: http://packages.linuxmint.com
- Mageia: https://madb.mageia.org
- Void: https://voidlinux.org/packages
- NixOS: https://nixos.org/nixos/packages.html
- Kali: https://pkg.kali.org
- Hyperbola: https://www.hyperbola.info/packages/
- SUSE: https://packagehub.suse.com
- Slackware: https://packages.slackware.
- Sabayon: https://packages.sabayon.org
- Puppy: http://wikka.puppylinux.com/CategoryCategory
- ROSA ABF: https://abf.io/search
- Python: https://pypi.org
- Perl CPAN: https://www.cpan.org
- R CRAN: https://cran.r-project.org
- NodeJS: https://www.npmjs.com/search?q=Online
- JavaScript (Yarn): https://yarnpkg.com
- JavaScript (Bower): https://bower.io
Please file an issue with URL to package search engine and I will add it.