The views, opinions and concepts expressed are those by the author of this entry only and do not necessary conform to industry descriptions or best practises.
Citrix
1: http://edocs.citrix.com provides a great fundamental knowledge base to install, configure and deploy Citrix products standalone or in a H/A pair configuration.
2: http://support.citrix.com provides a variety or supporting documentation surrounding Citrix’s product stacks that include best practises, guides and much more.
3: http://blogs.citrix.com is an absolutely great resource for past, present and future Citrix product knowledge i.e master class webinars, best practises articles, announcements and much more.
4: http://www.citrix.com/tv provides video based delivery of Citrix’s technologies.
5: http://community.citrix.com/p/success-kits requires the appropriate www.citrix.com access privileges.
6: https://www.citrix.com/buy/licensing/agreements.html Citrix Product EULA, EUSA.
7: https://www.citrix.com/buy/licensing.html Licensing Basic’s.
8: https://www.citrix.com/support/product-lifecycle/product-matrix.html Citrix Product Life Cycle Matrix.
9: https://www.citrix.com/downloads.html Citrix Software Package and Virtual Appliance Downloads area.
10: https://taas.citrix.com/AutoSupport/ the link explains it what this service is all about.
11: http://store.citrix.com purchase select Citrix licensing online e.g XenServer, NetScaler VPX.
Microsoft
1: http://technet.microsoft.com/en-us/ provides a wealth of good technical resources.
2: http://msdn.microsoft.com/en-us/ is a great developer network.
Apple
1: http://www.apple.com/certificateauthority/ useful for downloading and installing the certs, crl’s onto the IIS to resolve any APNS chaining issues. Learn more about APNS workflow, security and more at – https://developer.apple.com/library/mac/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/Chapters/ApplePushService.html#//apple_ref/doc/uid/TP40008194-CH100-SW3.
2: https://developer.apple.com/programs/ios/enterprise/ & https://developer.apple.com/support/ios/enterprise.html – which is required in order to obtain an Apple iOS distribution profile and certificate to digitally sign and wrap your *.IPA file to become an *.MDX file using the Citrix AppPreparation Tool + XCode.
3: https://developer.apple.com/xcode/ is used with the Citrix AppPreparation Tool.
4: http://www.apple.com/uk/support/appleid/basics/ explains the different processes for creating an Apple ID with and without a credit card. Also visit http://support.apple.com/kb/HT5622 which provides general FAQ surrounding an Apple ID.