These are downloadable apps that can synch content across multiple computers and devices.
I use the first three all the time!
- MarsEdit – blog management app for Mac (not free, but worth every penny)
- Dropbox (synch a range of files across multiple devices)
- Evernote – note management for Mac, Windows, web, and mobile
- Simplenote – simple note app for web and mobile (synchs with Mac or Windows through separate apps)
- Notational Simplicity – Mac app for synching Simplenote