... I send out a list of most interesting libraries and apps in the "Crystal" section to about 1100 subscribers.
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An implementation of RFC-6901 and RFC-6902 in Crystal Lang
simple http directory listing tool with up- and download functionality written in crystal
Crystal bindings and easy-to-use wrapper classes for TinkerForge components.
Crystal implementation of the Haversine formula to calculate distances between two points given their latitudes and longitudes
Build server-rendered Vue.js apps with a Crystal backend