1. VectorEquation: cdf/VectorEquation/VectorEquation.cdf Visualize linear combinations of two vectors in $\mathbb{R}^2$ and use them to solve a linear system.
2. CoordinateExplorer: cdf/CoordinateExplorer/CoordinateExplorer.cdf Visualize coordinate systems determined by two different choices of basis for $\mathbb{R}^2\text{.}$
3. LinearSolver: cdf/LinearSolver/LinearSolver.cdf (Popular) Visualize a $2\times 2$ matrix as a transformation from domain to codomain, and use the result to visualize what solving its associated linear system looks like.