Here are a ton of great tools that are all Chrome friendly and can be used to foster great creativity.
Mecabricks - Online Lego builder that can be downloaded for 3D printing. No registration needed to build but user must be logged in to download files and save.
Planner 5D - Interior design site
Roomstyler 3D - Room planning site
Tinkercad - Great 3D design site. Does require log-in.
Zimmer Twins at School - Free to use. $9.95 per month for optional teacher classroom management subscription
Beautiful Audio Editor - Chrome based audio mixer
Mix the Cloud - DJ crossfader for Soundcloud and YouTube audio
Soundtrap - Multiple layer audio mixer
Speak Pipe - Receive audio messages or use as a super simple audio recorder
Google CS First: Create your own Google Logo | More information
Scratch - MIT's open source programing platform
Book Creator App - This one does require some front-loaded setup but is a great tool for students to share learning. Book Creator Ambassador Kelly Croy shares some insight on this episode of this Wired Educator podcast.
Lunapic (right click extension)
Picozu (Chrome App)
Pixlr.com (Editor and Express) (right click extension)
Ribbet (Chrome App) - Access Google Photos and save back in Google Photos
Adobe Spark - All kinds of creativity tools.
Screencastify - Record your screen WeVideo - Video editor
Animate any portrait with facial expressions at Avatar.Pho.To
Photofunia - Small number of image effects may contain weapons of be of a PG nature.