related techniques that allow chaining commands in one single gesture through submenus. However, using interaction techniques that are not pointer-based have proven problematic with both pie and linear menus for cluttered digital tabletop, where physical objects might occlude menu items. Pie menus are unavailable as standard graphical control element in common commercial toolkits. Video games often require custom widget development, so pie menu cost is lower in that particular scenario. Notable implementations Software Blender, an open source 3D modelling program, which currently has pie menus as an optional feature PowerAnimator, a commercial 3D modelling program that used marking menus Mozilla and Mozilla Firefox extensions RadialContext and easyGestures Autodesk Maya, a commercial 3D modelling program Metisse and Unix Desktop Environment, window managers for the X Window System modo, an advanced polygon and subdivision surface modeling package Songza, a music search engine and internet jukebox that uses a pie menu for its main mode of interaction, by Aza Raskin Quicksilver via the Constellation plug-in Sugar, GUI implementation for the One Laptop per Child project BumpTop, a computer desktop created to mimic paper files on a real world desk that uses pie menus as many of its control menus Android Browser in Android OneNote App for Windows 8 and Windows RT The Cherry mouse driver for the Power Pad mouse M-1000 optionally offers a circular context menu The Samsung Galaxy Note series, starting with the Note 3 Games The 2000 videogame The Sims extensively utilized pie menus for player-directed interaction. These pie menus were primarily developed by Don Hopkins. The videogame Grand Theft Auto V, for weapon and radio station selection The virtual world Second Life Secret of Mana and its successor Secret of Evermore (where the menu was used to accelerate the pacing of combat) The Temple of Elemental Evil Mass Effect The Curse of Monkey Island, also called a "Verb Coin" See also Crossing-based interface Menu (computing) Pie chart References External links JavaScript/jQuery Radmenu Plugin, Open source The Flower Menu is a marking menu implementation for Qt Tcl/Tk - A simple implementation in pure Tcl/Tk Pie Menus in c2 wiki Pie Menus for Qt Pie Menus for OLPC Sugar User Interface, in Python with GTK, Cairo and Pango modules Slashdot article: Pie-menus in Mozilla Asymetrix [ToolBook] pie menu component, by Paolo Tosolini. Source code: Piemenu.com Piemenu.com. Python - Open source Python pie menus for GTK/Cairo/Pango/OLPC/Sugar user interface, by Don Hopkins. OpenLaszlo