Knowbody Stamp It for Mac

From Knowbody:

This plugin enables you to add fields in textboxes. The fields are automatically updated. The fields can contain: Timestamp, last username, list of used fonts in doc. and also a complete log on all users who have modified the document. It also enables you to add timestamps and other fields. The CS version fits perfectly to the newly updated slug-area of InDesign CS. It allows you to place formated timestamps, logs, print-numbers, saved-numbers etc. in the slug-area and have them automatically updated on save.
Some of the newest features:

• XMP support: All data is also updated into XMP.
• Modify dates on images are added to XMP allowing for EXTERNAL decision on whether any image needs update in the document!
• Copy/paste of tagged info between documents are updated on save.
• Option to include fonts in images to the font listing
• Option to make font list comma delimited.
• Option to make image list comma delimited.
• Option to split image list by page number.