Evernote
Free; iOS, Android, Windows Phone 8, BlackBerry, Mac, Windows, Web
Pros: Makes inputting text, audio, images, and Web content easy; OCR for images and handwriting
Cons: No calendar sync, reminders, or true collaboration features in the free version
Evernote is perhaps the most popular note-taking app, and a favorite of GTD aficionados. By activating its checkbox feature, you can make it act like a to-do app. You can share notes via email, easily insert photos and audio clips, and organize items by date, tags, and location. Evernote Business ($10 per user per month) adds a companywide Business Library and admin console.
OneNote Mobile
Free; iOS, Android, Windows Phone 8, Windows, Mac (within Microsoft Office), Office Web Apps
Pros: Simple interface; collaboration; free cloud syncing for up to 500 notes…
