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- Not Just a Contact Database
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These optional components give you more power to connect and engage your supporters.

civiCASE
Case management for clients and constituents.

civiCONTRIBUTE
Online fundraising and donor management.

civiEVENT
Online event registration and participant tracking.

civiMEMBER
Online signup and membership management.

civiMAIL
Personalized email blasts and newsletters.

civiREPORT
Report generation and template management.



3rd-party modules are the gating factor
"the gating factors that have held me off migration so far included quite a few strategic third-party modules that hadn't been ported; now, CiviCRM 2.1 will be the last of them."
As soon as the 6.0 version of LDAP Integration is stable (it's currently in alpha) I would be happy to move to Drupal 6. Until then, not. This is a long-winded way of saying that yes, 3rd-party module support for Drupal 6 is still a gating factor.