These OS Specific Single-protocol Servers have been sorted by hosting Operating System.

AmigaOS

AGopherexx (ver 0.3) - Freeware

GoFish (ver 0.27) - Freeware


CMS

Rice CMS Gopher Server (ver 2.4.2) - Freeware

VieGOPHER Server (ver ?) - Freeware


DOS 3x [MsDOS v3.3 and above, FreeDOS, etc.]

GS for DOS WATTCP (ver 1.1) - Freeware

KA9Q NOS (ver 1.92) - Freeware

PC Gopher Server (ver ?) - Freeware


MacOS 7x [system 7.5.1 -to- system 10.4.11]

GopherSurfer (ver 1.1b3r2) - Freeware

MacServer (ver 1.0.1) - Freeware


MVS

MVS Gopher Server (ver 3r1) - Freeware


Plan 9

GopherD for Plan 9 (ver ?) - Freeware


VMS

VMS Gopher Server (ver 1.2VMS-1) - Freeware


Warp [OS/2 v3.0 and above, eComStation, etc.] = (see also Windows 3x and DOS 3x)

GoServe (ver 1.20) - Abandonware


Windows 3x [v3.0 -to- v3.11] = (see also DOS 3x)

GO4HAM (ver 1.06beta) - Freeware

GopherD (ver 0.53) - Freeware


Windows 9x [Win95, Win98, Me, etc.] = (see also Windows 3x)

Motsognir (ver 0.99) - Freeware


Windows NT [NT v4.0 and above, Win2k, etc.] = (see also Windows 9x)

GopherD (ver 3.6) - Abandonware

GopherS (ver 0.92) - Abandoned Freeware

Gophserv (ver 0.4) - Freeware



++ Unix-based ++ [various flavors]

Geomyidae (ver 0.26.3) - Freeware

GoFish (ver 1.2) - Freeware

GopherD (ver 3.0.5) - Freeware

GopherD_BSD (ver ?) - Freeware

Gophernicus (ver 3.0.1) - Freeware

Gophrier (ver 0.2.3) - Freeware

Goscher (ver 0.4.3-ta6le) - Freeware

mgod (ver 1.1) - Freeware

Motsognir (ver 1.0.12) - Freeware

sgopherd (ver October 2012) - Freeware

shrewd (ver 0.1a) - Freeware

Spacecookie (ver ver 0.2.1.1) - Freeware

UMN GopherD (ver 2.3.1) - Abandoned Freeware ~ supports Gopher+