Seems like a useful app and it works pretty well. Others have mentioned the font, but in general I think if you worked with a designer on improving the overally appearance and the design of the different elements, the app would benefit greatly.
I was thinking primarily the widgets. I'd check out a program like Omnigraffle or Visio to get a sense of the kind of objects they have there and see the visual style that they are using. I am assuming this is kinda meant to be a lightweight replacement for one of those.
Is there a grid at all? It make it hard to line things up. I was trying to select more than one object, to try aligning, but I couldn't figure out how. No shift click or option click or command click.
Thank you for trying it out The grid is there under the container section http://www.mockuptiger.com/how-to-build-table-grids
You can use the rubberband to select multiple and then use the align buttons in the top toolbar.
You can use ctrl+click. Shift click is not supported.
I made it easy for everyone to check it out. If you wish you can also download the application on your desktop using this link
http://tinyurl.com/3f4rcco