IvMaiasn.SourceForge.net offers open source tools for working with ASN1, ECN, and XDR
About IvMaiasn.SourceForge.net
A collection of the ASN.1/ECN parser, XDR-to-ASN.1 converter and pretty-printer scripts for ASN.1/ECN specifications. Contains also a formal definition of the ASN.1 built-in types, ECN encoding classes and XDR encoding rules.
Includes a comprehensive list of the ASN.1 normative documents and a collection of the web resources.