popCoin

Quickly be notified of all incoming and outgoing payments to any Bitcoin address you specify. Whenever a payment is received or sent, popCoin will display a small notification at the top right corner of the screen, with the payment displayed in BTC and USD.

popCoin does NOT store any personal information. Access to Blockchain.info is needed solely to check address balances.

Vesion 2.0:
*Watch up to 6 addresses
*You can now assign names/labels to your addresses
*Various bugfixes

Version 1.5.6:
*Minor bug fix

Version 1.5.5:
*Bitstamp current market price is now displayed in bottom right corner of popup
*The value of transactions are now also displayed in USD

Version 1.5.2:
*Added support for addresses of length between 27 & 33 characters, in addition to default 34
*Added nonintrusive donation button

Version 1.5.1:
*Quick fix for bug where restarting the browser would display false notifications

What's New in version 1.5:
*popCoin now saves your set Bitcoin address locally between browser sessions
*Added a wipe data button to completely remove any address stored
*Added a check balance button
*Memory management is now 5 times more efficient
*Smoother transitions

Github repository: https://github.com/leethomas/popCoin