YouTube Decade - Watch the most viewed videos posted exactly 10 years ago
Hover Zoom - Enlarge thumbnails on mouse over.
CDNPerf - CDN performance and uptime statistics
Image Max URL - Help find larger or original versions of images, including a customizable image popup feature
mlytics - Boost websites and apps faster and safer
Hover Zoom+ - Google Chrome extension for zooming images on mouse hover - extesy/hoverzoom