Programming:
RPG/400, ILE RPG, RPG/36, COBOL/400, ILE COBOL, COBOL/36, CL, ILE CL, OCL/36, Net.Data, Java, CGIDEV2

OS:
OS/400

DBMS:
DB2/400

Configuration Management Tool:
ALDON CMS, TURNOVER, AFFINITY

Middleware:
Websphere, MQ Series

Caching:
memcached, OSCache

CMS:
Alfresco, dotCMS

Web Server:
AS/400 Internet Server, Apache

APIs and Tools:
Gumbo Mail, XML Tools