Glassboard is an application for sharing data, images and concepts with closed groups of individuals which is suitable for private and professional use. Glassboard is currently in beta and free to try out.
Glassboard needs you to sign-up before using it. Once you do, you will find that a room to share files that you can add data files, pictures or feedback to. As the creator of the board, you can encourage other people via email, who can then put files and opinions as nicely. You can also produce an invitation code, which other Glassboard participants can use to be a part of your specific board.
Even so, Glassboard is still in try out, so this will be exciting to see how this app shapes up. It would be great to see the team manage the simplicity and ease-of-use they have already built into the app as they go along. If you are looking for a way to share files with a team easily and find other active options a task, give Glassboard a try.