You love Gmail, but you miss folders to sort your emails? Organize your labels in a folder-like hierarchy with the Folders4Gmail userscript.

Displays results for google image search, video search, wikipedia search, dictionary.com search and other language versions of wikipedia search alongside normal google searches.

Removes ads and unwanted sections (configurable), allows downloading and resizing videos, displays all comments on video page, expands the description, can prevent autoplay and autodownload, adds a HD (High Definition) select, etc...

Double click any youtube link to show the video in page, allowing drag and resize multiple videos without leaving the page.

This script gets contents of reading item on Google Reader. You must set up SITE_INFO in source code.

Make YouTube more like Google Video

For new version of Gmail: when viewing a message/conversation, the advertisement box on the right is removed and messages and reply box occupy the full width available. Long titles are optionally truncated.

Removes all the chrome from Google Reader and just gives you a bare bones interface

Highlights Topic Author's Comments on habrahabr.ru

Adds a link to the original page in all items in Google Reader at the end of the items.

Automatically decorates the Google Reader subscription list with icons corresponding to the website from which each feed originates. This replicates an effect currently available in other feed-readers such as Bloglines.

Adds a "Preview button" to Google Reader that allows you to view actual article in a frame. Clicking again on that button goes back to RSS view. Does work both in List view and expanded view.

Autoloads for next page of ALL PAGE. In a word, this is General Auto Pager.

Add tap scrollbar for MicroB (Nokia n800/n810)

Expands nested discussion threads in place

Adds a "Mark Read" or "Mark Unread" button to Gmail pages (active only when mail items are selected).

Fix up display for Nokia internet tablet

Allows for Labels to be hidden in the label bar

Submits your vote w/o opening new window or reloading page + more

Right-click on any conversation to get a preview bubble.