What are the best apps for salespeople?

My team of sales reps use both Android and iPhone and I'm looking for some good apps to recommend to them to help them manage their time and productivity. Any suggestions?

Wunderlist: https://itunes.apple.com/...mpt=uo%3D4
It's a great all around business app, which helps you manage things.

Numbers: https://itunes.apple.com/...04891?mt=8
It's like Apple's version of Excel.

Things: https://itunes.apple.com/...65411?mt=8
This is a great task organizer, notebook, and to-do list with many features.

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