Group Ware in Linux???

[Sanvir Singh Jham <ssjham@xxxxxxxxxxxxxxxx>]

Hi All, 
I am looking for a group ware like Lotus Domino / Notes (whatever!!!) or
M$ Exchange, which can perform a host of activities for a group like, task
sharing, appointments, clipboard activity, broadcasts. the clients on my
LAN are all M$ Winduhs 9x. 
Any such utility on Linux????

All help appreciated.

Thanx & regards,
Sanvir

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Sanvir Singh Jham                   Tel: 694 1831/6619/6612/8617/ 5226/7/8
Velocient Technologies Limited      Fax: 694 3732
New Delhi                           E-Mail:sanvir.jham@xxxxxxxxxxxxxxxx
                                            ssjham@xxxxxxxxxxx
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