This is not my library,
I just wanted to shout out that if you want to use Split.io for experiments or feature flags, they now officially support Elixir
The Elixir thin client SDK enables developers to integrate Harness FME feature flagging and event tracking directly into their Elixir applications. Leveraging Split Daemon (splitd), this lightweight SDK provides highly performant first-class FME support within Elixir.
Thanks are due to the team at Cars.com for the initial implementation, which they contributed to the FME user community. The Harness engineering team then finalized the work, making it generally available as a Harness-supported FME SDK.