UBUNTU

Use below links for ISO download

EDITION VERSION ARCHITECTURE DOWNLOAD
Desktop 13.04 64-bit Click to download
Desktop 13.04 32-bit Click to download
Desktop 12.10 64-bit Click to download
Desktop 12.10 32-bit Click to download
Desktop 12.04 64-bit Click to download
Desktop 12.04 32-bit Click to download
Desktop 11.10 64-bit Click to download
Desktop 11.10 32-bit Click to download
Desktop 11.04 64-bit Click to download
Desktop 11.04 32-bit Click to download
EDITION VERSION ARCHITECTURE DOWNLOAD
Server 13.04 64-bit Click to download
Server 12.04 64-bit Click to download
Server 12.04 32-bit Click to download
Server 10.04 64-bit Click to download
Server 10.04 32-bit Click to download