I would like to store data using google protocol buffers (another serialized format would work, too), and then have an UI to browse that data. Is there a C++ framework/API that
One GUI I just came across is protobufeditor -- it seems pretty powerful for browsing generic data. It is written in Java, so one cannot easily use/extend it from C++. (And it is not particularly polished at this point, e.g., one needs to maximize the main window to get a semi-useful layout of the sub-windows.) So this is a rather temporary solution.