Cost: Free or Premium ($5.99 per month)
Evernote is a desktop/mobile note taking app. Quite simply, you open Evernote, write/record a note or attach an image – click sync – and your note appears on every device you have it installed on. Capture anything, accesss anywhere. I use this several times a day for personal reminders, passwords, blog post ideas and everything else. Great app that I highly recommended. The free version offers 60MB of storage, which is quite a lot for text/audio notes but adds up if you add lots of images (which I do not). Premium version offers 1 GB monthly uploads, top priority support, search within PDFs, view notebooks while offline and more.
LogMeIn is a mobile/desktop app that allows you to log into and remotely control any computer you own from your smartphone. You download the LogMeIn app for your mobile device and for each device you want to be able to remotely log in to. I just started using LogMeIn, but I cursed this person who turned me onto it for not turning me onto it sooner. There are premium (paid) options as well, but I haven’t explored it enough to explain.