Speedrunning - Cassette Beasts

Floating Speedrun Timer - Apps on Google Play

10 minutes speedrun timer for speedruns

See how fast you can run a 100m dash with this Arduino timer

1 minute speedrun timer for speedruns

YZ Battery Powered Wireless Laser Timer for Sprints, Track Laser Timer 40 Yard Dash, Stopwatch for Lap Running Speed Drills Sking Skating Track Field BMX Barrel Racing - Yahoo Shopping

Speedrunning: The Ultimate Challenge – The Jacket Journal

Splitter - Speedrun Timer on the Mac App Store

Measuring Running Image & Photo (Free Trial)

Speedrunning in Teams! Minecraft Data Pack

ESTINK 60A 10-55V DC Brush Motor Speed Controller Digital LCD Slow Run/Stop Timer Reversible,PWM Speed Controller,Forward Reverse Motor Controller