ksnip

Install command: 
brew install --cask ksnip

Name: ksnip

Screenshot and annotation tool

https://github.com/ksnip/ksnip

/api/cask/ksnip.json (JSON API)

Cask code on GitHub

Current version: 1.9.1

Analytics:

Installs (30 days)
ksnip 37
Installs (90 days)
ksnip 139
Installs (365 days)
ksnip 363
Fork me on GitHub