ultrarunning

Free, open-source carb loading calculator: day-by-day carbs in grams, food portions and a pre-race meal for the days before a long race. Perfect for amatheur endurance athletes looking for a simple, science-backed tool to calculate their carb loading needs before a competition or intense, long workout.

Ultrarunning training theory practice pack for quizmill — Johnston, Koop, Magness, and the Roches

Local-first running coach CLI: syncs Garmin Connect, builds block-based training plans, matches them against real runs and adapts the next block. Methodology grounded in running training literature and multi-year on-field experience. Your data stays on your machine.

Flask app for visualizing running race history with geocoded maps, SVG timelines, heatmaps, and MKV video generation.

A TypeScript toolkit for building endurance sports applications.

OEI's design system for building web and mobile applications.

HowFar? A free Garmin data field for trail and ultra runners: time to the next checkpoint, learned from your own pace on climbs and descents.

AI coaches that refuse to do the work for you. Launch Dreams. Start Thriving. Write the book. Launch the business. Run the ultra. Open Agent Skills (agentskills.io) for Claude, Codex, Gemini, Cursor, and more. Free, from Ultra-Normal LLC