Web Communication

PadLet Wall - virtual wall allowing people to share thoughts, files, images, etc.
GoogleDrive - Drive starts you with 15 GB of free Google online storage, so you can keep photos, stories, designs, drawings, recordings, videos 
PicasaWebAlbums - You can upload and share your photos online using Picasa Web Albums. (and view in Google Photos)
Google Groups - 
Google Maps - 
DropBox - 

Image Search

Email
Gmail - 
Yahoo - 
Outlook - 

Video

Teaching
Quizlet.com - Quizlet is a free website providing learning tools for students, including flashcards, study and game modes.

www.diigo.com - allows signed-up users to bookmark and tag Web pages. Additionally, it allows users to highlight any part of a webpage and attach sticky notes to specific highlights or to a whole page