Treblekey is a website with musical exercises and resources for beginner musicians. It has sections for learning how to navigate the guitar fretboard, for ear training and for generating random notes to play.

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Funnelbranch is a funnel analytics service which helps marketers measure and improve conversion metrics on their websites (think: onboarding funnels or product purchase funnels).

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Jongmah is a free-to-play Mahjong Solitaire (tile matching) browser game. It features a playlist with relaxing music and several board layouts of varying difficulty.

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Educadia is an online course platform—after signing up and enrolling into a particular course (free or paid), a student will be given on-demand streaming access to all of the course's video lessons.

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Yellit is a mobile chat app where users can leave small messages at geographic locations. Available for both iOS and Android devices.

See below for some impressions (click to enlarge).