Firefux
The world's smexiest web browser. For a more serious definition, see Firefox.
I'm going to go boot up Firefux to look up algorithms for solving 3rd degree, 4th order inhomogenous linear PDEs such as (((du/dx)^2) - ((d^4u/dy^4) * ((d^2u/dz^2)^3 )))= ((x^2)*(y^2)*(z^2)).