PolyBLEP oscillators are just totally awesome. I haven't found a more CPU efficient way to get basic oscillators free of aliasing or artifacts.
The polyblep triangle which I cobbled together may be of most interest as the square and saw are found in the RjDj library.
The triangle works by feeding a pb-square into an integrator. The integrator could probably be used on its own for purposes like envelopes or experimental feedback. Note that there's an audio loop with send and receive objects so you may want to use the integrator in an abstraction or change the s/r names if using multiple triangles in the same patch.