I am using Ubuntu/Fedora. Which available mock-up builders i can use before making a website? Follow up: Adobe AIR for Linux is no longer supported. To access older, unsupported versions, please read the AIR archive. Different operating system? Downloaded: http://www.balsamiq.com/download Direct Links Mockups for Desktop: Cross-Platform: MockupsForDesktop.air Windows: MockupsForDesktop.exe Mac OSX: MockupsForDesktop.dmg Linux 32bit: MockupsForDesktop32bit.deb Linux 64bit: MockupsForDesktop64bit.deb Windows with Adobe Air bundled: MockupsForDesktopInstallerWin.zip (for offline installations).