Linux,OS/X,Tandem
Java,Python,C,MQL4,COBOL
HTML5,Javascript,JQuery,JQueryMobile,PhoneGap
Android location-based apps,GIS backend databases based on OSM
SQL,XML,XMLSchema,XSLT
Trading systems (MT4)
Network admin, Linux system admin, Database admin
VoIP & SIP (Asterisk)
Database design, migration (PostgreSQL,MySQL,sqlite)
Conversion tools (COBOL ISAM->SQL,COBOL->Java)
Compiler development (JavaCC,Yacc,Lex)
Expert systems (CLIPS,Jess)
Neural Networks (ANN)
ARM(LPC2148,RaspberryPi),mesh networks (ZigBee,XBee)