Hotmail: Owned by Microsoft
Founded in 1996 by Sabeer Bhatia and Jack Smith, Hotmail was acquired by Microsoft in 1997. It was relaunched as MSN Hotmail, then later rebranded to Windows Live Hotmail as part of the Windows Live suite of products.
Microsoft phased out Hotmail in October 2011, relaunching the service as Outlook.com in 2012.
Outlook, Hotmail and Live email accounts can be accessed here.