Business visa
This visa is very similar to a tourist visa: it is delivered for a duration of 3 months maximum, can be renewed in Australia, however the main objective is purely business instead of travelling; it allows you to take appointments with Australian companies, take part into conventions and conferences or develop a business project. In no case you can be remunerated or employed by a company in Australia while on this visa.
For longer or frequent visits or lengthy projects, there are some other possibilities. You'd better contact the Australian Embassy in your country or the
DIAC.