IceSL is a state-of-the-art slicer and modeling software tailored for advanced 3D printing applications. Developed by research scientists at the Inria Nancy Grand-Est / Loria in France, IceSL integrates slicing, modeling, and script-based functionalities in one package, offering a robust solution for creating optimized prints with sophisticated geometrical details. The software stands out for its innovative approach to slicing with intricate internal structures and multi-material printing capabilities. It allows users to directly sculpt models and generate G-code for 3D printers, streamlining the workflow from model design to physical printing. IceSL is continually updated and available for free, primarily aimed at researchers, educators, and enthusiasts seeking precision and customization in 3D printing tasks.