Tools, simulators, and interactive guides — built to learn, explore, and create.
Real-time market intelligence across 100 stocks — DCF valuation, scenario analysis, Monte Carlo simulation, and a custom watchlist.
Investing fundamentals, glossary, and tools including compound interest and DCA calculators — from first dollar to full portfolio.
A double-entry, event-sourced transaction ledger — Java/Spring Boot, PostgreSQL. Idempotency and consistency under concurrency aren't just designed for — they're proven by concurrency tests that fire real parallel transactions at a live Postgres instance in CI.
An event-ingestion pipeline feeding LEDGER — Java/Spring Kafka, Redpanda. Proves the other half of real-time transaction processing: ordered, at-least-once delivery made effectively-once by an idempotent receiver, with bounded retries and dead-lettering so one bad event can't stall a stream. In active development — repo and design docs live now.
Compare Token Bucket, Sliding Window, Fixed Window, and Leaky Bucket algorithms with a live canvas timeline and per-algorithm stats.
A live Cloudflare Workers gateway — API key auth, per-key rate limiting, request routing, and a real-time analytics dashboard backed by a Durable Object.
Paste a SQL query, get a cost-annotated execution tree, index suggestions, and diagnostics covering joins, aggregates, and subqueries.
Build finite state machines on a canvas — define states, draw transitions with events and guards, then step through execution.
Design CI/CD stages, simulate runs with configurable failure rates, watch parallel jobs execute, and review duration metrics.
Two editors, one document — live Operational Transformation keeps them in sync, with a conflict simulator for classic OT scenarios.
Paste two SQL or JSON schemas, see a visual diff of added, removed, and changed columns, and get a ready-to-run migration script.
Simulate Raft consensus and leader election across a live node cluster — trigger elections, partition the network, and watch Lamport clocks advance in real time.
Draw flowcharts and system architecture diagrams — place shapes, connect them with labelled arrows, and export your design.
Colour tools suite — explore palettes, convert between colour spaces, generate gradients, and check contrast accessibility.
Watch sorting algorithms, pathfinding, and binary search trees execute step by step with animated visuals and complexity notes.
Generate a disposable encrypted inbox. Receive and send email for up to an hour — AES-256-GCM encrypted in memory, nothing ever written to disk.
Drop a pin, share a map. Interactive geospatial tool built on MapLibre GL — pin locations, add notes, and share a live link with anyone.
Supreme Court opinions decoded. Layered explainers built on Claude AI and Cloudflare Workers — background, holding, reasoning, dissents, and real-world impact, written with intelligence and a voice that makes constitutional law irresistible. Educational only. Not legal advice.
Complete LSAT prep — Logical Reasoning, Analytical Reasoning, Reading Comprehension, test strategy, practice questions, and a 44-term glossary.
A full mathematics curriculum from arithmetic to differential equations — interactive calculators, formula reference, and a 90-term glossary.
Ethical hacking and cybersecurity — offensive techniques, defensive security, a tools reference, 50+ term glossary, and a full learning roadmap.
Human anatomy and EMT guide — body systems, trauma, clinical protocols, vital sign tables, and the full EMT career pathway.
Meal plans, recipes, and nearby restaurant options built around dietary restrictions like lactose intolerance and celiac disease. In active development — free Android download available now.
A SMART on FHIR clinical viewer demonstrating the OAuth2/PKCE app-launch pattern real EHR systems require of third-party apps. Synthetic sandbox data only. In active development — free Android download available now.