While my wife and son are visiting the San Francisco Zoo with my son's cubscout den, I am at home putting together an OCSP object viewer.  Here is a snapshot of what I got so far.

It's showing an OCSP response data which is DER-encoded.  The grid is actually a tree view control with multiple columns.  I'll have to whip up some icons for different types of ASN.1 objects though.  I am using OpenSSL to parse the data but it's just too heavy and console-oriented for my purpose.  When I have more time, I'll turn it into a generic ASN.1 viewer.