SnapCal
Whether you are scheduling a meeting or looking at weekend plans this app gives you great weekly and monthly views of multiple calendars. Toggle which calendars to display and add events in a snap.
Download
2Do
I’ve tested a ton of tasklist apps and 2do is the best there is. Tasks, checklists, notes, and most importantly the ability to add action to tasks. Sync w/ Toodledo for a web based interface.
Evernote – capture notes and sync across all devices. Stay organized.
Never lose an idea again. Capture thoughts via text/photo/voice and sync with the desktop app. Great for keeping important info at hand as well.
CardMunch – Business Card Reader by LinkedIn.
Snap a picture of a business card and CardMunch will transcribe it into contact info that you can save directly to the iPhone. This is a critical app for an networker.
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Gist
Gist is a contact manager that leverages the social web to give your more info about your contacts. It excels at showing recent activity (twitter/email/facebook) and offers a great website gist.com. Drawback – it doesn’t always pull phone numbers.
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Twezr
Alternative contact manager similar to Gist but more action oriented. Doesn’t have a website and slower to update. Try both.
USPS Mobile®
Snail mail is still necessary and this app is the quickest way to find a USPS dropox.
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Bloomberg
Markets move when you do so keep this app handy for market news and excellent graphs.