ViennaFEM is a free open-source implementation of a finite element solver for partial differential equations in C++. The library is built from several orthogonal components: ViennaCL for the linear solver (including GPU acceleration), ViennaData for storing quantities on the grid, which is handled by ViennaGrid, and ViennaMath as a symbolic math kernel used for automatically deriving the weak formulation of the provided PDE.

• Automatic derivation of the weak form for a given strong form (restrictions apply)
• Dimension-independent programming: The same code works in 1d, 2d and 3d
• Multiple FEM runs on the same mesh supported (no data interference)
• Mesh refinement for triangular and tetrahedral meshes
• GPU-acceleration via ViennaCL available
• Multi-Platform support
• Header-Only library
• Permissive MIT/X11 license

More information can be found at http://viennafem.sourceforge.net/