Offline Installer – Skype for computer
For windows: offline installer http://www.skype.com/go/getskype-full For other platforms: https://www.skype.com/en/download-skype/skype-for-computer/
OfflineInstaller – Mozilla Firefox browser
Latest version : https://www.mozilla.org/en-US/firefox/all/ Earlier versions : https://ftp.mozilla.org/pub/firefox/releases/