One of the direct descendants of the Tango icon theme is the GNOME (now called Adwaita) icon theme (the following applies only to versions 2.29.0 and greater). Although at first glance this theme may not have the exact style of Tango, it is still based off the that style, only shinier. Source versions of this icon theme come in with SVG sources, opening up the possibility for creating more icons in the GNOME style.vicmarcal wrote: When searching for a Tango substitute, we found several XP themes for Linux iconsets, even we checked the Explorer++ ones, and we discovered that they were using icons extracted from Windows and hence illegal to use them.
However, the one I linked seems to have its own iconset and recently released, and they can be used if they are under GPL.
More information may be found at my topic: viewtopic.php?f=25&t=13109