File Explorer, Total Commander, Double Commander, FreeCommander, Dolphin File Manager, Far Manager, GNOME Files, Q-Dir, XnView MP, Thunar, Directory Opus, Commander One, Path Finder, OneCommander, Spacedrive, NERD tree, Vifm, Altap Salamander, UltraExplorer, QTTabBar, oMega Commander, Caja, Tablacus Explorer, Simple File Manager, Unreal Commander, Post Haste, Electerm, Saladin, Index (Maui Applications), SpaceFM, emelFM2 are some alternatives to Sigma File Manager.