Photo credit: Michael Brown

1. Octro Talk: Mobile instant messenger lets you to communicate with your friends on multiple IM networks with text and VoIP
2. Egnyte: Groupware application synchronizes your files and documents online, so that others can edit and work on them
3. Workhack: Whiteboard to-do list allows users to set up takjs and appointments and share them with their group through a code
4. Useamap: Web-based service allows you to create maps with specific points to share with other people through simple URLs

1. Octro Talk
   
   
   
   Octro Talk is a mobile instant messaging software with full VoIP and file sharing integration that supports GoogleTalk, MSN, AIM, ICQ and Yahoo. It enables you to communicate with your buddies whenever and wherever you are via text chat or voice. It works over GPRS/EDGE/CDMA/Wifi/Bluetooth connections on Pocket PC (Windows Mobile 5) and Smartphones devices. Free beta
   
   http://www.octro.com/





2. Egnyte
   
   Egnyte is a groupware application that allows you to create online folders for sharing files, documents and emails with others. Its small client application uploads your files automatically and they remain synchronized with their original files on your computer (PC, Mac, or Linux). Plus, when other users work on the files, their changes are synced back to you instantly. Free to use with 1GB of file storage.
   https://www.egnyte.com/





3. Workhack
   
   Workhack is a whiteboard to-do list that you can use to set up tasks and appointments with priority settings. With no need to sign up for an account, Workhack generates a unique page, that you can also share with other people providing them with a group id number. Plus a miniWorkHack pop-up allows you to add and see all of your to-dos in a little window outside of your web-browser. Free
   http://workhack.com/







4. Useamap
   
   Useamap is a web-based service that allows you to set specific points for appointments or meetings on a GoogleMap, and it provides you with a short URL that you can share with your team's members, friends or anyone else. It takes just a few seconds to create a map, just the time of making up a name, finding the place, and sharing the URL. Free
   http://useamap.com