Appomattox is a project to build a set of cross-platform mapping objects for the .NET framework. It is also a desktop GIS application. It currently supports the following data sources: shapefiles, raster data (JPEG, GIF, TIFF, bitmap, and PNG), and PostGIS. The goal of Appomattox is to provide an elegant and intuitive user interface for mapping and Geographic Information Systems (GIS) without sacrificing power and functionality.
Faith is a cross-platform C++ graphical application toolkit. It runs natively on Linux/Unix (Xlib) and Windows. It has an API strongly inspired by Qt's and has many features that are expected from a modern toolkit, including a variety of common "widgets", an aesthetically pleasing appearance, and the many critical non-portable components such as anti-aliasing and sockets.