Applications
FAVORITE APPLICATIONS
The Omnigroup Suite (Particularly OmniOutliner and OmniFocus)
The two applications below, I use all the time. Unfortunately, I believe they’re currently only for mac. Yet, if they are, I’d say they’re almost sufficient reason on their own to buy a mac (or an iPad).
OmniOutliner
OmniOutliner is an application for organizing nested lists. I don’t know about anyone else, but I definitely have use for nested manipulable lists multiple times a day. To brainstorm and work out processes, to build quick (and reusable) task or action lists, etc., and I find OmniOutliner great for these things.
Site: OmniOutliner for Mac
OmniFocus
For managing actions and projects, OmniFocus, particularly for iPhone, is I think without peer at current. Features I particularly enjoy include: the ability to build and employ a nested structure of contexts for actions (thus working awesomely for instituting a GTD flow), setting recurring actions anywhere from hours to years after either onset or completion of an action, and the ability to organize actions as parts of projects, the projects being set up as either procedural and hence required to be done one after another, or non-procedural meaning that each action is independent of any other action in a project (because lets face it, projects do come in both these flavors).
Site: OmniFocus for iPhone
OmniGroup Suite
Site: OmniGroup Suite
The 37signals Suite (Particularly Basecamp)
I currently use Basecamp for managing all of my collaborative projects online. Offered by 37signals in a tiered freemium subscription model which you can upgrade / downgrade monthly according to changing need (though you will lose some features and project allowances if you downgrade to a plan which offers less than you really need), it offers online collaborative messaging, to-do lists, events and milestones calendar management, chat, and file sharing on a project by project basis, all behind SSL encryption.
Site: 37signals