This talk compares composer with npm, bower, bundler, pip, berkshelf,… and their ecosystems of packages. Compared to these, composer is excelling with some pretty awesome features. I will focus on the great advantages of composer. Things like virtual packages, custom scripts, calling static methods straight from composer.json, the replaces keyword, … Stuff that most people don’t know about because they don’t always have to use it, but it could help them if they would know about it. At last I will tell about what the packagist ecosystem can learn from other ecosystems, and what package developers can do to further improve it to become a more healthy ecosystem.