Jamboard Sketch and collaborate on an interactive canvas with Jamboard—Google’s cloud-based smartboard, on your computer, phone, or tablet.
Available with your OU email account Android and iOS. Cost: Free

Notetaking

Adobe Acrobat Reader is the free global standard for reliably viewing, signing, and commenting on PDF documents.
Available for Android and iOS Cost: Free

Evernote Take notes. Keep a journal. Clip anything from the web. Evernote lets you store and share information quickly and securely.
Available for Android and iOS. Cost: Free

Cold Turkey Boost your productivity and reclaim your free time by blocking distracting websites, games and applications.
Available for Mac and Windows Cost: Free for limited service, pro version for $29.00

Freedom enables you to block distractions on all your devices – phone, tablet, and computer. With Freedom, you can be more productive, break a bad habit, or simply improve your relationship with technology.
Available for Mac, Windows and iOS and mobile web. Cost: App is Free, monthly and yearly subscription for the service

Mendeley Free citation management program that works on your desktop & the web, with social networking & group collaboration features. Sign up for a free account Mendeley Account
Available for Android, iOS, online and your desktop. Cost: Free