LetaLab.eu

Set your own New Tab page in Chromium-based browsers, and change it any time from a small popup.

Refresh every open tab in every open window with one click, with toggles for which windows to include and whether to bypass cache.

Finds black bars around a playing video and crops, zooms, or stretches it to fill the screen.

Forces your preferred YouTube video quality, falling back to the highest quality available when your preference isn't offered.