Hex vs SDKMAN: What are the differences?
Developers describe Hex as "Package manager for the Erlang ecosystem". Hex is package manager for the Erlang VM. This project currently provides tasks that integrate with Mix, Elixir's build tool. On the other hand, SDKMAN is detailed as "A CLI Tool To Easily Manage Multiple Software Development Kits". It provides a convenient way to install, switch, list and remove candidates. Using it, you can now manage parallel versions of multiple SDKs easily on any Unix-like operating system.
Hex and SDKMAN can be categorized as "Package Managers" tools.
Hex is an open source tool with 570 GitHub stars and 118 GitHub forks. Here's a link to Hex's open source repository on GitHub.