No software installation is necessary. The casinos cater to those who cannot or do not wish to install casino software on their computers. Instead you have the option of playing directly in your browser using Flash technology. In our list, you will see which casinos offer this service. You can also check the casino's web site. Look for where it says Flash, No Download or Instant Play.
In the left menu you will find a couple of casino games in Flash. You can play for free by clicking on "Trial version". Many casinos have a Flash version. Intercasino, for instance, has both a Flash version and a traditional version.