Knicked from an ABC page:

• Griefline: Phone support for all Australians Monday to Friday and 24/7 online forums. Call 1300 845 745 from 8:00am to 8:00pm AEDT
• Kids Helpline: 24/7 phone support and WebChat for young people aged between five and 25. Call 1800 551 800
• Headspace: Centres for young people in each state and territory or check out headspace for online or phone support
• Lifeline: 24-hour support for all Australians on 13 11 14