JTB BatchAttEdit 2.3 has been released and got some bugs fixed and performance improvements.
This batch attribute editor app for AutoCAD collects attributes in all blocks of specified name patterns in multiple drawings and display in a wide spreadsheet. Then you can edit attribute texts as easy as working with Excel. Once done, click "Apply Attribute Changes" to update values to drawings.
This makes it a great app to for example edit title block attributes across many drawings instead of having to do it one drawing at a time.