Here's what I've got so far:
1D CFD Simulation in WebGL  GitHub
 Supports Euler, RungeKutta2, RungeKutta4, and Iterative CrankNicolson3 explicit integration.
 Supports a number of flux limiters.
 Supports mirror, periodic, and freeflow boundary conditions.

Compressible Euler fluid equation simulation with the following:
 Initial Conditions:
 Sod shock tube test initial conditions
 Sedov blast test initial conditions (works under the Burger's solver, breaks under the Roe solver unless the limiter is set to "donor cell")
 simple wave advection
 simple bell curve perturbation
 Solvers:
 Burgers / Explicit Integration
 Burgers / Implicit Integration of Backward Euler via GaussSeidel
 Roe / Explicit Integration

ADM formalism (from Alcubierre's Numerical Relativity) is half working,
works best with "donor cell" limiter, but barely pulls along at that.

SRHD with Roe Solver and Sod shock tube initial conditions is in the works.
2D CFD Simulation in WebGL  GitHub
 Supports Euler, RungeKutta2, RungaKutta4, and Iterative CrankNicolson3 explicit integration.
 Supports a number of flux limiters.
 Supports mirror, periodic, and freeflow boundary conditions perside of the grid.
 Supports arbitrary boundaries on the rectangular grid (see "Sod w/Cylinder" initial conditions).
 Supports gravity / external forces.
 Compressible Euler fluid equation simulation with the following:
 Initial Conditions:
 Sod shock tube test extended to two dimensions
 Sod shock tube test with a cylinder obstacle
 simple bell curve perturbation
 KelvinHemholtz instability demo (left and right boundaries must be set to "periodic" to best observe the phenomenon)
 RayleighTaylor instability demo (left and right boundaries must be set to "periodic" and external force Y direction must be set to "1" to best observe the phenomenon)
 Solvers:
 Burgers / Explicit Integration
 Burgers / Implicit Integration of Backward Euler via GaussSeidel
 Roe / Explicit Integration
 Supports a number of flux limiters.
 Compressible Euler fluid equation simulation with the following:
 Initial Conditions:
 Sod shock tube test extended to two dimensions
 Sod shock tube test with a cylinder obstacle (currently only works with the Burgers solver)
 simple bell curve perturbation
 KelvinHemholtz instability demo (currently only works with Burgers solver)
 Solvers:
 Burgers / Explicit Integration
 Roe / Explicit Integration