Plugin that tracks autoloaded options usage and allows the user to optimize them.
Plugin Tag: cleanup
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Delete Duplicate Posts
Get rid of duplicate posts and pages (any post type) on your blog with manual or automatic modes.
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Simple Revisions Delete
Simple Revisions Delete adds a discreet link within a post submit box to let you purge (delete) its revisions via AJAX. Bulk actions also available.
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WP-Sweep
WP-Sweep allows you to clean up unused, orphaned and duplicated data in your WordPress. It also optimizes your database tables.