- runs on (Windows) desktop
- runs on tablet (Android, for now)
- runs on smartphone (Android, for now)
I'm averse to cloud-based solutions , so Google Calendar or the like is out . Ideally, input would be allowed from any platform and shared with all other platforms. Right now, that would include a B&N Color Nook, a Toshiba Thrive, a Nexus 7, a Samsung Galaxy SIII, and various Windows 7machines. That hardware might change - I'm considering a Win8 tablet if I can stomach Win8 and if the price can be justified. Ditto, Win8 phone. Prolly won't use a *nix-based system, as those are mostly play/experiment systems for me, not long-term work systems. (Not trying to start anything - *nix distros just don't fit into my professional* usages .)
Why not cloud? Just today there was a piece of mail from the Republican National Committee (on the back flap) with a (front) return address of Mitt Romney. It was addresses to Databarn Databarn. (databarn is an alias I've used off and on when subscribing to various online elements.) That name, along with my correct address, was hijacked from some Web site - it's never been used for shipping. And I've never, knowingly at least, subscribed to any political entity. (At one (1) point I did have a Web site published under that name - a decade ago!) That's just one (1) reason I don't use cloud services, no matter how convenient. There simply is no security that cannot be broken (as I learned when I spent a few years in cryptography).
*Professional, at bottom, means you get paid for it.