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OsmAnd is an offline maps and GPS navigation app that uses OpenStreetMap data for travel and outdoor routes.
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GPS maps for your GPX, KML tracks, routes and your outdoor activities
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Marine and nautical chartplotter. Offline maps for boating and sailing.
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One-Tap Sensor Logger with Watch, Streaming, Bluetooth & Multi-User Studies
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Meet fellow amateur/ham radio fans in Public Rooms, Private Rooms and with DMs.
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Unit and Currency Converter with built-in Calculator
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Your language coach for learning to speak Japanese, fast: vocabulary and grammar
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C++ Quiz App with 415 questions and detailed explanations to boost skills!
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Interactive map that shows real time sensor data.
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3map app prototype. (OLD version)
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Collect geo-localized data
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Sea Flow Tracker: Collect precise current data using GPS