Hi! If you are using PowerPoint on Windows and are looking for a convenient way to insert LaTeX equations, I'd like to suggest trying out IguanaTex, which I am now in charge of developing:
It's a good and free alternative to the now apparently abandonned TexPoint.
The LaTeX displays created with IguanaTex support formatting (rotation, resizing, color fills, etc), animations, as well as inclusion in groups (even hierarchical): they can be edited while retaining all these properties.
I hope you like it.
Give it a spin!