Borrow a tablet (iPad)
Applications installed on the tablets
Library iPad tablets have all built-in apps (Safari, Mail, iBooks, Photos, FaceTime, Maps, Messages, Calendar, Reminders, App Store, iTunes, etc.) plus the iWorks Suite of productivity apps (Pages - for word processing, Numbers - for spreadsheets, and Keynote - for presentations).
If you'd like to download more apps, such as Skype, you can go to Settings > Store > Sign Out, and sign in with your own Apple ID, which you can create (if you don't already have one): Create a new Apple ID