| 1 | I.E.C. Software | United Kingdom | | |
| 2 | I.S.P. Marketing Ltd | | | |
| 3 | I.W.S. | United Kingdom | | |
| 4 | Ian Carroll | United Kingdom | | |
| 5 | Ian Cox | United Kingdom | | |
| 6 | Ian Williams | United Kingdom | | |
| 7 | Iber Software | | International Business S.A. | | | | |
| 8 | Iberofon S.A. | Spain | | |
| 9 | IBSA | | International Business S.A. | | | | |
| 10 | IC Software | | Ian Carroll | | | | |
| 11 | IC&D Ltd | | | |
| 12 | Ice Cool Coders | United Kingdom | | |
| 13 | Ice Group | Russia | Dimitrovgrad | |
| 14 | ICE Software | United Kingdom | | |
| 15 | ICL | United Kingdom | | |
| 16 | Icon Design Ltd | United Kingdom | | |
| 17 | Icon Designs | United Kingdom | | |
| 18 | Icon Software Ltd | United Kingdom | | |
| 19 | Ideal Software | Spain | | |
| 20 | Idealogic S.A. | Spain | | |
| 21 | Idem Soft | Argentina | | |
| 22 | Idi Productions | | EMM Information Systems GmbH | | | | |
| 23 | IDL | United Kingdom | | |
| 24 | IE Applications Ltd | United Kingdom | | |
| 25 | IG Programs | United Kingdom | | |
| 26 | Igneous 1 Software | United Kingdom | | |
| 27 | IJK Software Ltd | | BBC | | | | |
| 28 | Ijskosoft | | | |
| 29 | IKO & RGSoft | Slovakia | | |
| 30 | IKS | Poland | | |
| 31 | Il Mio Computer | | Istituto Geografico De Agostini S.p.A. | | | | |
| 32 | Illusion | Poland | | |
| 33 | Illusion Dreams | Russia | | |
| 34 | Illusion Group | Poland | | |
| 35 | Illusion Software Ltd | United Kingdom | | |
| 36 | Illusion Works | Russia | | |
| 37 | IMA Soft | Russia | | |
| 38 | Image Crew | Russia | Kirov |  |
| 39 | Image Design | United Kingdom | | |
| 40 | Image Software Ltd | United Kingdom | | |
| 41 | Image Systems | United Kingdom | | |
| 42 | Image Works | | Mirrorsoft Ltd | | | | |
| 43 | Images Ltd | | Images Software Ltd | | | | |
| 44 | Images Software Ltd | | | |
| 45 | Imagesoft | United Kingdom | | |
| 46 | Imagination Studios | Lithuania | Vilnius | |
| 47 | Imagine | Russia | | |
| 48 | Imagine Software Ltd | | Atari Inc | | | | |
| 49 | Imagitec Design Ltd | | Gremlin Interactive | | | | |
| 50 | Impact Creative Group | Russia | | |
| 51 | Impact Software [1] | United Kingdom | | |
| 52 | Impact Software [2] | United Kingdom | | |
| 53 | Impact Software [3] | United Kingdom | | |
| 54 | Impact Software [4] | United Kingdom | | |
| 55 | Imperial Soft | Spain | | |
| 56 | Imperial Software | United Kingdom | | |
| 57 | Impressions Ltd | | Sierra On-Line | | | | |
| 58 | Impulse Software | United Kingdom | | |
| 59 | Impulsoft | | Stichting Impuls | | | | |
| 60 | Impulze | | Zeppelin Games Ltd | | | | |
| 61 | IMS Software | United Kingdom | | |
| 62 | Inaxel S.A. | Spain | | |
| 63 | Incantation | United Kingdom | | |
| 64 | Incentive Software Ltd | | Superscape Ltd | | | | |
| 65 | Incognito Software | United Kingdom | | |
| 66 | Independent Creators | Russia | | |
| 67 | Independent Software | United Kingdom | | |
| 68 | Indescomp S.A. | Spain | | |
| 69 | Indigo Group | Ukraine | Kryvyi Rih | |
| 70 | Individual Software | Germany | | |
| 71 | Individual Software Service | | Jurgen Schumpich GmbH | | | | |
| 72 | INDUG | United Kingdom | | |
| 73 | Infected Software | United Kingdom | | |
| 74 | Infernal Designs |
| 75 | Inferno Software Inc | Russia | | |
| 76 | Infinite Imaginations | United Kingdom | | |
| 77 | Infinite Software | United Kingdom | | |
| 78 | INFO Soft [1] | Czech Republic | | |
| 79 | Infocom | | | |
| 80 | Infogrames | | Atari Inc | | | | |
| 81 | Infogrames [FR] | | Infogrames | | | | |
| 82 | Inform Software | United Kingdom | | |
| 83 | Informatyczno-Elektroniczna Spoldzielnia Pracy INEL | Poland | | |
| 84 | Infosoft [2] | Russia | | |
| 85 | Infosoft Group | Russia | Rybinsk | |
| 86 | Infotek Group | Russia | Yekaterinburg | |
| 87 | Infotek Team | Russia | | |
| 88 | Ingelek Jackson | | Ediciones Ingelek S.A. | | | | |
| 89 | Inmensa Bola de Manteca (IBM) | | | |
| 90 | Innosoft | United Kingdom | | |
| 91 | INPUT | | Marshall Cavendish Ltd | | | | |
| 92 | Input Magazine | | | |
| 93 | Inside Law | Russia | Voronezh | |
| 94 | Insiders | | | |
| 95 | Insight Software | United Kingdom | | |
| 96 | Instant Products | United Kingdom | | |
| 97 | Instituto de Ciencias de la Educacion | | Universidad de Extremadura | | | | |
| 98 | Integer Research | United Kingdom | | |
| 99 | Intellicreations Inc | | | |
| 100 | Intelligent Design Ltd | United Kingdom | | |
| 101 | Intelligent Software Ltd | United Kingdom | | |
| 102 | Intentions Matrix Crew | Russia | Cheboksary | |
| 103 | Interactive Software People | | I.S.P. Marketing Ltd | | | | |
| 104 | Interactive Technology | United Kingdom | | |
| 105 | Interbit Software | Hungary | | |
| 106 | Interceptor Group | | | |
| 107 | Interceptor Software | | Interceptor Group | | | | |
| 108 | Intercomputer Inc | | | |
| 109 | Interface Publications Ltd | United Kingdom | | |
| 110 | Intergalactic Robots Ltd | United Kingdom | | |
| 111 | International Business S.A. | | | |
| 112 | International Publishing & Software Inc | Canada | | |
| 113 | Interplay Productions Inc | United States | | |
| 114 | Intersoft Software | United Kingdom | | |
| 115 | Interstella Software | United Kingdom | | |
| 116 | Intraset Ltd | United Kingdom | | |
| 117 | Intruders Corp | Russia | Kursk | |
| 118 | Invaders8 | Russia | Ryazan | |
| 119 | Investronica S.A. | Spain | | |
| 120 | Inxs Software | Poland | | |
| 121 | Io Software | United Kingdom | | |
| 122 | Ionis Software International | Germany | | |
| 123 | Ioshua S.A. | Spain | | |
| 124 | IPC Magazines Ltd | United Kingdom | | |
| 125 | IQ Services | United Kingdom | | |
| 126 | Iqisoft | Yugoslavia | | |
| 127 | Iron boyz | Russia | Arzamas | |
| 128 | Iron Byte | Uruguay | | |
| 129 | Iron Falcons | Ukraine | | |
| 130 | Ironguys | Russia | | |
| 131 | IS-DOS Support Team | Russia | Balashov | |
| 132 | ISC Ltd | United Kingdom | | |
| 133 | Island Records | | | |
| 134 | Isolated House | United Kingdom | | |
| 135 | Istari Design | Spain | | |
| 136 | Istituto Geografico De Agostini S.p.A. | | | |
| 137 | ITS Software | | Antique Master Ltd | | | | |
| 138 | Ivan Benishek | Serbia | | |
| 139 | Ivan Berg | | | |
| 140 | Ivan Berg Software Ltd |
| 141 | Ivan Sanchez Jorda | Spain | | |
| 142 | Ivanovsoft | Russia | | |
| 143 | Iveson Software S.A. | Spain | | |
| 144 | Ivysoft | United Kingdom | | |
| 145 | IZ Software | United Kingdom | | |
