It just occurred to me that I never posted an announcement thread about Q To-Do. As it's better late than never, here we go:

Q To-Do is a simplistic to-do list organizer that aims on being easily, quickly, and intuitively usable. It's main features are:

• Simple and Easy to Use User Interface
• Available for Smartphones (N9, Nemomobile), Tablets (Plasma Active), and Desktops (Linux, Windows)
• Synchronization between Different Installations, e.g., Smartphone and Desktop (Requires an e-mail account with IMAP support.)
• Support for Touch Screens and "Normal" Mouse/Keyboard Control
• Intuitive Swipe Gestures in all Versions
• Simple Sketches
• Nested To-Dos
• Progress Bar
• Indicator for Nesting Level
• Keyboard Shortcuts for Desktop Version
• Batch Delete of Done Items
• Different Colors for To-Dos
• System Tray Icon (Desktop Version)

You can get the Harmattan version from the Nokia store: http://store.ovi.com/content/269986
For more information, like screenshots, download links for the desktop versions etc., please see the Q To-Do homepage: http://ruedigergad.github.io/qtodo/

Edit: A SailfishOS version is in preparation.