Full-featured SQL editor with autocompletion and syntax highlighting is one of the main features of dbHarbor for SQLite.
The latest beta version already has a reliable SQL editor featuring really fast syntax highlighting and the basic support of autocompletion. Although we aiming to make the best in the class editor for SQL queries, it will be not possible to achieve this in the first release of dbHarbor. So we decided, that the first release will contain only the basic support of autocompletion skipping context-based autocompletion.
But we are actively working on this feature and it will be probably ready with the second or the third version.
Keep in touch!