TI-Nspire users can now do STEP BY STEP:

Vectors: Dot Product, Cross Product, Projection, Distance, ..

Vector Derivatives: Curl, Divergence, Laplacian, Curvature, ..

Line Integrals, Greens Theorem, Surface Integrals, Stokes Theorem

Analytic Geometry: Points, Lines, Planes

Multivariable Calculus: Tangent planes, Gradients, Lagrange Method, Laplace Transform,..

Linear Algebra: Row Echolon, Eigenvalues/vectors , Gram Schmidt Procedure, ..

Motion and Vector Values Functions

Parametric Equations

Conversions

and much more

More Details: http://www.tinspireapps.com/?a=VCME

Free trials.