picocli vs tmux: What are the differences?
picocli: Easily build command line apps with ANSI colors and autocomplete. Library and framework for easily building professional command line applications on the JVM (Java, Groovy, Kotlin, Scala, etc). Usage help with ANSI colors. Autocomplete. Nested subcommands. Annotations and programmatic API. Easy to include as source to avoid adding dependencies. More than just a command line parser; tmux: A terminal multiplexer. It enables a number of terminals to be created, accessed, and controlled from a single screen. tmux may be detached from a screen and continue running in the background, then later reattached.
picocli and tmux can be categorized as "Shell Utilities" tools.
picocli and tmux are both open source tools. It seems that tmux with 14.7K GitHub stars and 982 forks on GitHub has more adoption than picocli with 1.39K GitHub stars and 142 GitHub forks.