  During the last few years, the Geneva stellar evolution group has released
new grids of stellar models, including the effect of rotation and with updated
physical inputs (Ekstr\"om et al. 2012; Georgy et al. 2013a,b). To ease the
comparison between the outputs of the stellar evolution computations and the
observations, a dedicated tool was developed: the Syclist toolbox (Georgy et
al. 2014). It allows to compute interpolated stellar models, isochrones,
synthetic clusters, and to simulate the time-evolution of stellar populations.
