[aabdelhafez]

https://github.com/incipher/shamir

Here's a CLI, written in Go, that uses HashiCorp Vault's implementation of the Shamir Secret Sharing algorithm and exposes its functionality to the command-line in an easy-to-use manner.

I personally use it to divide my password manager's master password into shares that are given to family members and close friends in order for them to collectively reconstruct my master password and obtain access to my password vault in case I pass away.

Disclaimer: I'm the author.