With so many apps available for your smart phones, it can be hard to find quality apps that bring real value to your daily work flow. Here are a few good apps you definitely should check out:

Dropbox (iPhone, Android, Blackberry) – If you are unfamiliar, Dropbox is a free cloud storage system that lets you store and sync your files online. Once you create an account, you can sync your files between any computer or device that has Dropbox installed on it. It is a great way to make sure you have up-to-date files anywhere you have access to the internet, including your phone. Although it is initially limited to 2GB you can get more storage by either referring friends to Dropbox (up to 8GB) or purchase more space (up to 100GB).

QuickOffice (iPhone, Android, Palm, Symbian) – Working with word, powerpoint and excel files on a small device like a phone will probably never be ideal, but when you do need to make some quick changes to documents, QuickOffice can be a life saver. QuickOffice can grab your documents from your Dropbox or GoogleDoc accounts, which makes getting files into the app easy.

Evernote (iPhone, Android, Blackberry, Palm, Windows Mobile) – If you’re the type of person that constantly comes up with great new ideas but often forgets them later, Evernote may be exactly what you should be considering. Evernote lets you quickly take down notes in many ways such as pictures, website addresses, screen shots, audio recordings, emails or just an old fashion “written” note. The app stores your notes online, so you can review your notes later at your desk or at home.

ToodleDo (iPhone) – You could easily use Evernote to create to-do lists if a basic list is all you need, but if your needs are a little more complex, ToodleDo is a great tool to help you keep track of all the things you need to get done. ToodleDo will let you categories, prioritize, as well as set due dates and alerts. ToodleDo also uses “the cloud” to store your to-do list, so you can access your information on your computer as well.

Square (iPhone, Android) – Whether you run your own business or you just like to sell stuff on Craigslist once and a while, Square might be something worth looking into. When you sign up (squareup.com) they will mail you a small credit card reader that you attach to your phone (it looks pretty nifty if you ask me). With their app and device, you can accept credit cards everywhere you go! Now your customers have one less excuse why they can’t pay you on the spot.
Google Voice (iPhone, Android, Blackberry) – Google Voice is a neat service to use, particularly if you are someone that has to manage multiple phone lines (work, home, mobile, etc.). Google Voice well let people call one number that forwards to some or all of your phones. You can set it up so during the day only your work phones ring, but after a certain time calls can be sent directly to voicemail or to a different phone. You can also set up specific voicemails for different groups of people. Perfect if you run multiple businesses or simply use your business line as a personal line as well. There are many other smaller features that are nice as well such as getting your voicemails sent to you as emails using voice-to-text technology. Google Voice will give you a phone number to use when you sign up, but you can also transfer your mobile number to Google Voice if you don’t want to have to tell everyone that you have a new number. But be very careful! If you are still under contract with your mobile carrier keep in mind that when you transfer the number your cell phone line will be cancelled and you will likely get an early termination fee. The only carrier this isn’t currently a problem with is Sprint since they recently have integrated Google Voice into their systems.