Textastic can use TextMate definitions: http://www.textasticapp.com/v6/manual/lessons/How_can_I_add_my_own_syntax_definitions__themes_and_templates.html
Koder, another main contender, doesn't let you add syntax highlighting yet.
Textastic can use TextMate definitions: http://www.textasticapp.com/v6/manual/lessons/How_can_I_add_my_own_syntax_definitions__themes_and_templates.html
Koder, another main contender, doesn't let you add syntax highlighting yet.