G2G2

Lightning detector distance estimator.

Build a tropical resort by training workers from your past days.

Mobile POS system with voice ordering powered by Google Sheets

Train Morse code fast using visual path learning, audio tones, and reflex-based input.

Estimate a subject's standing height from two RTK GPS points, solar time.

Calculate how many batteries and solar panels.

Depth-based pump selector with animated well diagram.

Roof truss geometry calculator with 3D interactive viewer — span, pitch etc

Interactive water tank calculator with 3D visualization for storage/pressure.

Compare cost of living across 10 countries

Design any staircase in seconds: set rise, tread, and height with sliders

Test

Free digital scorecard for Liverpool Rummy with 5 game variants

Realistic open-circuit divemaster training simulator — manage gas, NDL

CCR rebreather dive trainer — manage PPO₂, bailout gas & deco stops

Test

Trust, betrayal, and votes: cooperate or defect, then vote one player out each round until only one is left standing.

Prisoner’s Dilemma sandbox – build strategies, run tournaments, or play head-to-head.

Calculate object height and generate safety rings automatically using RTK coordinates.

A 125-word minimalist language with a soft sound—learn it fast with flashcards, quizzes, and a searchable dictionary.

Learn all 120+ Toki Pona words with a fast in-browser trainer: word list, flashcards and quizzes.

Enter bearings, distances, auto-close the polygon, export a KML line.

Make precise RTK-ready point layouts for fences, vineyard , gardens.

Plot yearly analemma shadow path for fixed time using any pole or object.

Generate shadow lines, sunrise arcs, full-year solar geometry — RTK-accurate and ready for SW Maps or Google Earth.

Create precise real-shadow KML sundials from any latitude and date — perfect for RTK, SW Maps, and solar alignment.

A location-accurate sundial generator that uses RTK GNSS precision.

Test

Turn any image into mowable line art and export KML paths for Google Earth — fully offline, mobile-friendly.

Match and clear groups of tiles to score points and create powerful boosters 🚀💣🪩

Drag weather stations, watch the temperature field get analyzed.

Self-help maneuvers to help back pain on other joint pain

SCUBA Training Aid

Pendulum in the sand you can control some of the physics

Orbit Test

Genius of Life

Game of Life

Dive Planning

Defend the Dalton Gang & Dick Broadwell from a hail of lead at Coffeyville

Sonnyboy’s Run —an island dive‐shop speedboat operator—dodging “bills”.

Outrun the bills. Defend your household. Collapse is optional.

Drag to dodge, auto-fire to survive a rogue-AI cube swarm in this neon arcade shooter.

Warp through a shifting 4-D arena, auto-fire energy bolts, and pick time-bending upgrades after every wave.

Dodge beasts, snag power-ups, and choose upgrades as you hunt priceless relics in a lush endless-survival jungle.

Try to survive as long as possible as Doc Holiday in the shootout!

Survive endless waves of the undead in a fast, auto-shooting, browser-ready horde game.

Float through the stars, dodge alien dangers, and survive deep space in this cosmic mini-odyssey!

Free-roaming African safari survival game - dodge wild animals!

360° underwater adventure - move freely with touch controls!