Uncomplex has released Mailplane 3.0.2 with the addition of a few welcome user interface changes. The Gmail-specific email client’s main window now displays your selected account in the window title (handy for those managing multiple accounts), enables you to assign a global keyboard shortcut of your choosing to compose a new message, and highlights Find results as you type. Other improvements include the capability to drop URLs into a message and drag blocks of text to another position. Finally, Mailplane 3.0.2 is ready for the upcoming release of OS X 10.9 Mavericks. ($24.95 new, free update, 15 MB, release notes)
File Email with a Key in Apple Mail
In Mac OS X 10.4 Tiger or later, you can use the simple and fun MsgFiler Mail plug-in to file Mail messages using keyboard shortcuts.
New in Apple Mail 4 (the 10.6 Snow Leopard version), to assign a keyboard shortcut to any mailbox on the Move To or Copy To submenu, you can also open the Keyboard pane of System Preferences, click Keyboard Shortcuts, and select Application Shortcuts in the list on the left. Click the + button, choose Mail from the Application pop-up menu, type the name of the mailbox in the Menu Title field, click in the Keyboard Shortcut field, and press the keystroke combination you want to use. Then click Add.