The best iPhone apps for business

How to track expenses, monitor your sales team and master the 'Onassis' knot — all from the palm of your hand.

Credit Card Terminal, 99¢
Transforms your iPhone into a secure credit card terminal so you can accept customer payment anywhere. Additional monthly and usage fees apply.

Remote Desktop Lite, free
Get full, secure access to the files and programs on your office PC by remote. Your desktop must be running Windows XP Professional or Vista/Windows 7.

iExpensit, $4.99
Allows you to track business expenses, store receipts as digital photo attachments, and create detailed reports on the go, from anywhere.

My Eyes Only, $8.99
Uses RSA encryption to secure and store your personal info ? credit card and banking numbers, passwords ? so you can safely keep it on hand.

Salesforce Mobile, free
Lets you oversee and edit your salesforce’s status info ? account activities, new leads, important calls and meetings ? from wherever you are.

Etiquette Avenue, $2.99
Avoid gauche interactions with a wide range of etiquette tips, including proper handshake technique, e-manners and what to say at networking events.

Sign Here, $4.99
Allows you to create, digitally sign and send business and legal documents ? including non-disclosure agreements and bills of sale ? from your iPhone.

Bloomberg, free
Follow your investment portfolio and overall market movements with the help of stunningly designed charts and landscape graphs ? yes, really.

iTie, free
Offers illustrated, step-by-step instructions for tying any knot, including the four-in-hand, the Oriental, the formal half Windsor and the daring Onassis.

Pocket MBA, 99¢
Provides a full textbook, flash cards and interactive tests so you can study everything from finance to marketing in your own time, at your own pace.