From Holy Mackerel Software:
TwitHaven is designed as an internal messaging system useful for sending short messages and attachments without the complexities of email and SMS text systems. Users only need to know their colleagues' names. There is no set up necessary - just log in and go. A photo of each sender lets us be reminded of who is sending the Message. Messages can be sent to offsite email or SMS locations. Links with DocHaven and CRMHaven to receive messages regarding current Projects and Client workflows. Messages are spoken out lout to save having to read from the screen. Messages can be dismissed and recalled then drilled down to make finding messages easier. While messages are designed to be a limit of 140 characters (the limit of SMS), it is possible to expand them to any length, increasing the row height to view the whole message or copy and paste into a word-processor for editing. Messages can be sent to an individual or a group of users (you must be a member of that group to send to it) or both. All messages have a start and expiry date and time. This allows you to create a series of messages at the start of the year to remind users of upcoming events yet the message will not appear on their computers until the time has come. Also messages will expire so there is no need to remind people of events after the event is over. TwitHaven is available for any of Macintosh, Windows and Linux, it is available on the Cloud so there is no longer any excuse for people being uninformed. The sender can always check to see who has accepted the Message or not.
What's new in this version:
A message can be sent to multiple Users and multiple Groups by checking their checkboxes.