Simply with a browser, Cacoo enables you to create and insert beautiful diagrams easily into online documents. Any modifications appear instantly, so that the most recent version of the diagram is always displayed.I never get any problem with this till date.
Free cloud space, it will work with apple products also. you can sync all your devices at any time. I used it I never get any problem with this till date.
Live radio free for you, you can broad cast your concepts to the world. I never get any problem with this till date.
25 GB free space by Microsoft group. Excellent cloud storage.I never get any problem with this till date it is safe and secure also.
Team viewer is very good tool for remote assistance. in free versions this is the best tool. but if want to go for paid versions i will suggest you to go for gotomeeting.