Twitter - Twitter displays links without the http:// appended. However, when you copy that link, the http:// is appended for a split second.
/via Kevin Ebaugh
Read more here.

Twitter - Twitter displays links without the http:// appended. However, when you copy that link, the http:// is appended for a split second.

/via Kevin Ebaugh

Read more here.

Twitter - When moving the mouse over a tweet, the name fades out to show the performable actions.
/via Benjamin Trinczek

Twitter - When moving the mouse over a tweet, the name fades out to show the performable actions.

/via Benjamin Trinczek

Flickr - Error message when you exceed the 140 characters limit when posting a photo on Twitter.
/via Hugo

Flickr - Error message when you exceed the 140 characters limit when posting a photo on Twitter.

/via Hugo

Twitter - Tracks accounts that are viewed by unregistered and logged out users. Then prompts them to sign up and follow those accounts automatically. 
/via Jon Wheatly

Twitter - Tracks accounts that are viewed by unregistered and logged out users. Then prompts them to sign up and follow those accounts automatically. 

/via Jon Wheatly

Twitter - In iOS 5, attachments are aligned so that the scrollbar just fits between the view border.
/via uwe_

Twitter - In iOS 5, attachments are aligned so that the scrollbar just fits between the view border.

/via uwe_

Feather iOS App - The Twitter bird turns slowly green as you type and goes red when you get to the 140 character limit.
/via Anna PS

Feather iOS App - The Twitter bird turns slowly green as you type and goes red when you get to the 140 character limit.

/via Anna PS

Twitter OS X - Replaces time of the tweet with actions on mouse over.
/via Oldstrech

Twitter OS X - Replaces time of the tweet with actions on mouse over.

/via Oldstrech

Twitter for iPad - Swiping your timeline to the right, removes the content layer. It’s visualized by a little animation behind the timeline. 
/via Thomas

Twitter for iPad - Swiping your timeline to the right, removes the content layer. It’s visualized by a little animation behind the timeline. 

/via Thomas

Twitter for mac - After typing the first few letters of a word, pressing the ESC key will show a list of words that starts with those letters.
Edit: This is a native feature of OSX and works in some other apps as well. 
/via isseykun

Twitter for mac - After typing the first few letters of a word, pressing the ESC key will show a list of words that starts with those letters.

Edit: This is a native feature of OSX and works in some other apps as well. 

/via isseykun

Twitter for Mac - After installing the app, right click on any text in Mac OS X to see a tweet option.
/via Brendan Lee

Twitter for Mac - After installing the app, right click on any text in Mac OS X to see a tweet option.

/via Brendan Lee