Netboard.me was suggested by Tiziana Angiolini. At first glance it looks like it has a lot of options for designing online spaces to share notes, links, and pictures. You can have private or public walls.
For those looking for alternatives for @padlet I have a GSlides template which you can try. Its not exactly the same but by using the Master I made slides in which the teacher can drive where they want Ss to add content #gsuiteedu #edtech #WeAreCUE https://t.co/ecImpJAwMx pic.twitter.com/f7CFKPQ6XY— Ryan O'Donnell (@creativeedtech) April 4, 2018
Google Jamboard app has collaborative sticky notes and more. Works on tablets, iPads and Chromebooks with Android, view only on non-Android Chromebooks— ĪDĪM ššš¤šššš (@awisemannc) April 4, 2018
Thanks for sharing this! Blendspace (Tes Teach) has similar features. Also, can we start a hashtag... #Paidlet ?— Eric C. Santos (@SantosTechCoach) April 4, 2018
Mark Anderson wrote a post in which he suggested the Post-It Plus app for iOS.