A well-supported, clean file manager that looks to be simpler than competing software like Ranger. It's written in bash as a single shell script and man page. Upon looking over the code and issues page on GitHub, there does not seem to be any bugs that would jeopardize the integrity or security of files.
It also adheres more closely to vim bindings than other terminal file managers and is configurable via environment variables, cutting down on config file bloat.
License is MIT.
Currently has over 1.5k stars on GitHub so I would anticipate good adoption by the community -- especially those who want a minimal setup.