Mailjoy - Delightfully easy direct mail marketing. A DIY direct mail tool created for marketing and growth teams. Design, mail & track personalized direct mail postcards and letters. Digital marketers use Mailjoy to send data-driven mail campaigns.
Mac CLi - OS X command line tools for developers
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RealMailers - Send geo-targeted direct mail to 110M+ homes in the US
GitHub CLI - Official CLI tool for using GitHub from the command-line.