I have just updated my comparison of RPT management utilities for 2021. These are tools that allow you to scan, document, compare and in some cases batch update RPT files. The list includes 9 tools:

Report Runner Documentor by Jeff-Net
R-Tag Documentation and Search by R-Tag
CR Data Source Updater by R-Tag
Visual CUT and DataLink Viewer by Millet Software
Report Miner by the Retsel Group
Code Search Professional by Find it EZ Software Corp.
Dev Surge 365 by Find it EZ Software Corp.
.rpt Inspector 3 Professional Suite by Software Forces, LLC
.rpt Inspector Online by Software Forces, LLC