ShareCalendar   
http://www.4team.biz

Share Microsoft Outlook Calendar Folders without any server. Share different Calendar folders with different group of people. Create Group Calendar. "Subscribe" your folders' / subfolders data for your clients. Share Microsoft Outlook Calendars with your own custom forms and imported items. Work offline or online. Labels (colors) sharing in appointments sharing. You can synchronize shared Outlook items with your PDA or Palm device. Synchronize Outlook Calendar data between your desktop PC and laptop. Simple access control. Easy-to-use workgroup application. Start sharing in minutes.

Attachment Analyser   
http://www.MADSolutions.com

Analyse attachments and e-mail in your mailboxes, public folders or personal folder files. This free analyser will provide you with html reports you can use to help identify potential problem areas with respect to attachments within your e-mail system. Feel free to distribute this analyser to friends and colleagues.

Public Key File and Email Encryption freeware   
http://www.deltacrypt.com

DeltaCrypt OneClick Personal does it all: This Public Key Encryption Software encrypts files, text and emails with 1024-bit RSA protection, digital signatures, and unalterable public keys. It offers the basic encryption functionalities FREE OF CHARGE. Select files and folders or a combination of both and let DeltaCrypt OneClick Personal secure your sensitive data. For personal use only. DeltaCrypt applications provide sophisticated features and a user-friendly interface to keep encryption simple and easy. No special skills are required. Any format of file can be encrypted, no matter what the file extension. There is almost no limit to the volume of files that can be encrypted. One of the features of DeltaCrypt OneClick Personal is its ease of use with any email or text messaging software. From the icon in the System Tray, you can quickly encrypt or decrypt your email text …and then get back to what you were doing. Moreover,DeltaCrypt wipes out original source files, when requested at encryption, by replacing the original data with binary ‘00’. Deleted files are not transferred to the Windows’ recycle bin. When decrypting, DeltaCrypt reconstructs files identical to the original ones: same name, same time and same size. This flexible encryption program is constructed so as to permit the addition of additional plug-ins so as to meet any special requirements

MAPILab NNTP for Outlook   
http://www.mapilab.com

MAPILab NNTP allows you to read and post messages to newsgroups from Microsoft Outlook 2000, 2002/XP and 2003. This product is a full-function MAPI transport. This means that a news server account works in the same way as an account for Microsoft Exchange Server or a POP3/SMTP account, supports remote mail headers and is managed through the common Send/Receive menu. MAPILab NNTP for Outlook supports all messages formats (plain text, RTF, HTML) and encodings which are supported by Microsoft Outlook. It is fully compatible with (but doesn't require!) Microsoft Exchange Server and can be used to share newsgroups for coworkers through public folders.

MAPILab Share`n`Sync   
http://www.mapilab.com

MAPILab Share`n`Sync is designed to solve two tasks - synchronizing Outlook folders on several computers and organizing shared access to Microsoft Outlook folders for small companies. The product supports all types of Microsoft Outlook folders and items - email messages, contacts, notes, calendar, etc. The product also supports most types of folders and items that don't belong to Microsoft Outlook and which are attached with the help of special transports. The product is fully compatible with Microsoft Exchange Server and Microsoft Small Business Server. So if you want to synchronize a shared folder on Microsoft Exchange Server with an ordinary folder on your home PC...No problem! Actually, computers exchange data by e-mail. Before the data is transmitted, it is automatically compressed, so the product can even be used with dial-up lower-bit-rate channels. The product works according to the following principle: you specify a list of users that should get access to one of your folders. You can also give them different access rights - for reading, modifying, deleting or creating new components. After that, the initial synchronization of your folder with folders on other users' computers takes place. After you modify items stored in the folder, other users receive the data about the modified item. Their program recognizes the special message containing the data (if the folders are synchronized through e-mail) and updates the item transparently to the user. If a user with modification rights modifies something on his computer, you get a message with the corresponding data, and after the item is updated on your computer, all other users receive the updated data. All this is protected by a special mechanism for the resolution of collisions that can appear when, for example, two users modify the same element in your folder simultaneously.