Popular software for creating high-quality schematic figures suitable for publication includes Gnuplot, TikZ, CorelDraw, Inkscape, and Illustrator for 2D vector drawing, while Blender, Cinema4D, and 3dsmax are recommended for 3D modeling. Gnuplot is noted for its free access and ability to produce .eps figures, but it has limitations in drawing complex 3D schematics. Users also mention SigmaPlot for 3D surface plots, although it is considered limited. Ensight and Paraview are highlighted for advanced visualization, but they come with higher costs. Inkscape and GIMP are praised as free alternatives that can effectively handle both 2D and some 3D drawing tasks.