Instrumental
Instrumental is a real-time, high-scale application and server monitoring tool with intelligent alerts, a powerful query language, and free development accounts.
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Ngrok
Ngrok provides secure, encrypted tunnels to local services with out the requirement for port forwarding.
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Verdaccio
Verdaccio is an open-source local repository for NPM packages. It provides private-access packages, caching, and overriding public packages.
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