dzMdbViewer is a small tool I wrote, when I was stuck without a MS Access installation but needed to have a look into a .MDB file (and later .ACCDB file, if the Access Database Engine 2012 is installed).
It can open these files and display a list of queries and tables stored in them as well as the data they contain.
Also, for tables, it can show the field definitions.
Today I fixed a few bugs and released version 1.0.1. You can get it from OSDN. The source code is available too.