  This review presents the latest advances in the nebular studies of post-AGB
objects. Post-AGB stars are great tools to test nucleosynthesis and evolution
models for stars of low and intermediate masses, and the evolution of dust in
harsh environment. I will present the newly discovered class of post-RGB stars,
formed via binary interaction on the RGB. Binary systems can also lead to the
formation of two class of aspherical post-AGB, the Proto-Planetary Nebulae and
the naked post-AGBs (dusty RV Taus , a.k.a. Van Winckel's stars).
