AutoDWG Attribute Extractor is an interesting and practical graphic tool. It lets you rip all the attributes and properties of a DWG file without needing to install AutoCAD in your PC.
It works with the majority of DWG formats that exist, including those from AutoCAD 2009. All the information that AutoDWG Attribute Extractor rips is saved in a worksheet (very similar to those in Excel). Once in that format, you can view the data, order them, calculate attribute values, etc.
AutoDWG Attribute Extractor not only lets you export all the information to that worksheet, but also to TXT, CSV or even to XLS from MS Excel.