Greasy Fork is available in English.
Timer descrepancy test to demonstrate background tab timer throttling. Runs on TurkerHub and displays results in the tab's title bar.
Demonstrates timer throttling by displaying timer firing descrepancy and timer length in the title bar.
turkerhub.com/threads/*/* (Any daily thread on TurkerHub)
worker.mturk.com/?filters[search_term]=pandacrazy=on (Original Panda Crazy URL for the Worker site)