Prague Spring & the other "Revolutions of 1989" , al-Fateh revolution (Libya), Carnation revolution (which turned Portugal into a democracy), People Power Revolution (bringing democracy back to the Philipines), Mongolian revolution of 1990.
You could argue UK's Operation Boot in Iran, taking democracy away from Iran and putting the Shah in power, was a bloodless revolution too. The Shah loved to claim that - but he did have a ton of National Front executed in the immediate aftermath of his coup at the behest of his masters in the UK and US.