JTBC is a set of open source web content management system solutions , the earliest from 2006 , using the unique “language - code - templates” two separate technical models , follow the principle of simplicity and commitment to permanent free of charge. JTBC is an open source web content management system solution , the earliest from 2006 , using the unique “language - code - template” two separate technical models , follow the principle of simplicity and commitment to permanent free .