Is there a Google Doc-style UML tool?

I’m looking for a collaborative UML-compliant tool. I work in the context of two geographically spread out teams and we need to work together on the designed models.

Is there a web-based UML modeling tool with model sharing?

Well,

You can check those tools

• http://creately.com/
• https://sketchboard.me
• https://nulab-inc.com/products/cacoo/
• https://www.draw.io/ (free, open source, with Desktop version)

Thank you, Hippias Minor and Xaelis for tools. I've tried GenMyModel, draw.io and Cacoo. Below goes table with their some of their benefits, I've found.

                    GenMyModel                                         draw.io                    cacoo
save            auto                                                        dropbox, drive, diskctrl+s
features freeonly public diagrams, 20 elements maxall                            25 sheets max
export          jpg, uml (xmi), pdf                                  png, jpg, pdf, html   png, pdf, ppt, vector
multiplayer :)                              +                              drive.draw.io           +

Note, that cacoo and GenMyModel allows to edit diagram for many user simultaneosly, so one see changes right after other done them (drag finish will be seen). To collaborate with draw.io tool use drive.draw.io, but you have to register in google drive account (it shares link with that).

Now, I'm looking for something to show my cursor for others (like teacher has it's pointer) The only thing, I've already found is to add some geometry, e.g. rectangle and move it like pointer, but it's ugly. Will be glad for comments on that.

If you are looking for a real (UML conformance validation, XMI export) web-based UML modeling tool, you should give a try to GenMyModel