use-package is a macro, NOT a package manager. It can call either package.el (the default emacs package manager which uses MELPA but other package repo can be added) or straight.el (the new package manager alternative which allows to use package repos as package.el BUT also allows to use custom defined, git-sourced package repos)
Index of all python packages. pip looks here first to find a package.
Equatable overrides == and hashCode for you so you don't have to waste your time writing lots of boilerplate code.
Directory layout conventions for Dart and Flutter packages.
Leaf in emacs provides a better configuration and package loading in init.el. It is intended as plugin replacement for use-package.