We use
https://wiggio.com/ as a customizable listserv and free education account with
http://www.wikispaces.com/ as an easy website to post schedules, updates, files, directions, etc. Instead of remind for text messages, we will try to use these with a special wiggio list when we need to send texts via the email listserv -
http://www.emailtextmessages.com/. Slack looks useful too - more things to try!