In Sydney, tributes were paid to 25-year-old Western Sydney Wanderers fan Jack O'Brien, who was on his way home after a seven-week holiday in Europe when he was killed in the tragedy.
Mr O'Brien's beloved football club will tonight held a moment of silence before its game at Campbelltown Sports Stadium, and wore black armbands during the match.
In Melbourne, former US President Bill Clinton acknowledged victims who were bound for the International Aids Conference in the city and praised the Australian government's strength in the wake of the tragedy.
"I was very proud yesterday, to be in this country, when the Australian foreign minister spoke at the United Nations," he said.
Lowy Institute Executive Director Michael Fullilove said Tony Abbott had shown great leadership.
"The way in particular the prime minister came out very early in contrast to some international leaders actually played an important role in stiffening the west's resolve," he said.
Official condolence books have been placed at state and federal Parliament houses, electoral offices and other sites, for everyday Australians to reach out to the families affected by the tragedy.
