Tile38 is an in-memory geolocation data store, spatial index, and realtime geofencing server written in Go. It provides a Redis-compatible interface (RESP, HTTP, WebSocket, Telnet) for storing and querying geospatial objects (points, GeoJSON, bounding boxes, geohashes, tiles) with commands like SET, GET, NEARBY, WITHIN, INTERSECTS, and SCAN. The server supports leader/follower replication, AOF persistence, Lua scripting, and realtime geofencing via webhooks, pub/sub channels, and live connections. Its architecture is a single-binary server with a modular internal structure: a collection layer combining B-tree and R-tree indexing, a binary-encoded object and field storage for memory efficiency, a pluggable endpoint system for webhook delivery (HTTP, Kafka, MQTT, NATS, AMQP, SQS, etc.), and a custom protocol multiplexer. The codebase demonstrates high craftsmanship with reusable components like the collection data structure, glob matching, binary field lists, and endpoint manager, though some areas show signs of organic growth (e.g., large server.go, deprecated flags).
TeslaMate is a self-hosted data logger for Tesla vehicles that collects telemetry via the Tesla API (both polling and streaming), stores data in PostgreSQL, and provides visualization through a Phoenix LiveView web interface and Grafana dashboards. It integrates with home automation systems via MQTT and supports importing historical vehicle data from CSV files (TeslaFi format). The application uses a supervision tree to manage background processes for data collection, MQTT publishing, import tasks, and update checking. Key features include geofencing for location-based cost tracking, encrypted storage for API tokens using Cloak, internationalization via Gettext, and custom Ecto expressions for geographic calculations. The architecture is monolithic with clear separation of concerns through Phoenix contexts (Log, Vehicles, Settings, Locations).
This repository is a React Native library that wraps Radar's native iOS and Android SDKs to provide geofencing, location tracking, trip tracking, geocoding, search, context, route/matrix, places, beacons, fraud verification, and in-app messaging capabilities. It exposes a JavaScript API (Radar.initialize, Radar.autocomplete, etc.) and optional UI components (Map, Autocomplete) for use in React Native applications. The architecture consists of a TypeScript/JavaScript layer that communicates with native code via React Native's bridge (old and new architectures), with vendored iOS xcframeworks and Android Java modules. The library handles native setup automation (AppDelegate injection, Podfile modification) through an Expo config plugin, and includes version sync scripts to keep SDK versions consistent across platforms. It supports both iOS and Android, with optional fraud and motion SDK extensions. The example app demonstrates usage with MapLibre for map display. The codebase is well-structured with CI workflows, tests for the Expo config plugin, and careful version management, though it carries binary xcframework artifacts and dual architecture support that increase maintenance surface.