One of AC3D's main features is its compatibility with other 3D modeling programs, such as 3D Studio, Lightwave, Povray or LDraw. It can thus import and export formats used by these programs.
AC3D lets you edit polygons and vertex lines which are limited in number. It can also execute up to six different operations on a single vertex or on a group of vertices.
Plus, using AC3D you can apply antialiasing effects on the images to soften their borders; render models, including their textures; include up to seven different light origins, etc.
14 day trial version.