123 DB Clean Suite provides tools to clean your ACT! database with dramatic speed improvements:
Search and Remove
Remove a User's Activities
Remove Activities by field value.
Clean Cleared and Orphaned Activities
Make Private or Public selected activities
Transfer a Selected Activity
Remove activities by type
Cap RecurEndDate on recurring activities
Identify Activities that crash the Act! SDK
And much, much, more.
Remove User's History
Remove by Regarding Field Match
Transfer history to a different user
Remove histories by type