| 1 | I.E.C. Software | Великобритания | | |
| 2 | I.S.P. Marketing Ltd | | | |
| 3 | I.W.S. | Великобритания | | |
| 4 | Ian Carroll | Великобритания | | |
| 5 | Ian Cox | Великобритания | | |
| 6 | Ian Williams | Великобритания | | |
| 7 | Iber | | | |
| 8 | Iber Software | International Business S.A. | | |
| 9 | Iber Software | Испания | | |
| 10 | Iber' | | | |
| 11 | Iberofon S.A. | Испания | | |
| 12 | IBSA | International Business S.A. | | |
| 13 | IC Software | Ian Carroll | Великобритания | |
| 14 | IC&D Ltd | | | |
| 15 | IC&D Ltd | | | |
| 16 | IC&D Ltd | | | |
| 17 | Ice Cool Coders | Великобритания | | |
| 18 | Ice Group | Россия | Димитровград | |
| 19 | Ice Group | Россия | | |
| 20 | ICE Software | Великобритания | | |
| 21 | ICL | Великобритания | | |
| 22 | Icon | | | |
| 23 | Icon & Grand Slam | | | |
| 24 | Icon Design | | | |
| 25 | Icon Design Ltd | Великобритания | | |
| 26 | Icon Designs | Великобритания | | |
| 27 | Icon Designs | Великобритания | | |
| 28 | Icon Software Ltd | Великобритания | | |
| 29 | Icon;Melbourne House | | | |
| 30 | Ideal Software | Испания | | |
| 31 | Idealogic S.A. | Испания | | |
| 32 | Idem | | | |
| 33 | Idem Soft | Аргентина | | |
| 34 | Idem Soft | Испания | | |
| 35 | Idi Productions | EMM Information Systems GmbH | | |
| 36 | IDL | Великобритания | | |
| 37 | IE Applications Ltd | Великобритания | | |
| 38 | IG Programs | Великобритания | | |
| 39 | Igneous 1 Software | Великобритания | | |
| 40 | Igoval | | | |
| 41 | IJK Software Ltd | BBC | | |
| 42 | Ijskosoft | | | |
| 43 | IKO & RGSoft | Словакия | | |
| 44 | IKO & RGSoft | Словакия | | |
| 45 | IKS | Польша | | |
| 46 | Il Mio Computer | Istituto Geografico De Agostini S.p.A. | | |
| 47 | Illusion | Польша | | |
| 48 | Illusion (zx spectrum) | | | |
| 49 | illusion [spexxy] | | | |
| 50 | Illusion Dreams | Россия | | |
| 51 | Illusion Dreams | Россия | | |
| 52 | Illusion Group | Польша | | |
| 53 | Illusion Group | Польша | | |
| 54 | Illusion Software Ltd | Великобритания | | |
| 55 | Illusion Works | Россия | | |
| 56 | Illusion Works | Россия | | |
| 57 | IMA Soft | Россия | | |
| 58 | Image Crew | Россия | Киров | |
| 59 | Image Crew | Россия | | |
| 60 | Image Design | Великобритания | | |
| 61 | Image Software Ltd | Великобритания | | |
| 62 | Image Systems | Великобритания | | |
| 63 | Image Works | | | |
| 64 | Image Works | Mirrorsoft Ltd | Великобритания | |
| 65 | Image Works-91 | | | |
| 66 | Images | | | |
| 67 | Images Ltd | Великобритания | | |
| 68 | Images Ltd | Images Software Ltd | | |
| 69 | Images Software Ltd | | | |
| 70 | Imagesoft | Великобритания | | |
| 71 | Imagic | | | |
| 72 | Imagination Studios | Литва | Вильнюс | |
| 73 | Imagine | Россия | | |
| 74 | Imagine Software Ltd | Atari Inc | | |
| 75 | Imagine Software Ltd | | | |
| 76 | Imagine Software Ltd-86 | | | |
| 77 | Imagine Software Ltd-88 | | | |
| 78 | Imagine Software Ltd-89 | | | |
| 79 | Imagitec Design Ltd | Gremlin Interactive | | |
| 80 | Imagitec Design Ltd | | | |
| 81 | Impact Creative Group | Россия | | |
| 82 | Impact Software [1] | Великобритания | | |
| 83 | Impact Software [2] | Великобритания | | |
| 84 | Impact Software [3] | Великобритания | | |
| 85 | Impact Software [4] | Великобритания | | |
| 86 | Imperial Soft | Испания | | |
| 87 | Imperial Software | Великобритания | | |
| 88 | Impressions Ltd | Sierra On-Line | Соединенные Штаты Америки | |
| 89 | Impulse Software | Великобритания | | |
| 90 | Impulsoft | Stichting Impuls | | |
| 91 | Impulze | missing | | |
| 92 | IMS Software | Великобритания | | |
| 93 | Inaxel S.A. | Испания | | |
| 94 | Incantation | Великобритания | | |
| 95 | Incentive Software Ltd | Великобритания | | |
| 96 | Incentive Software Ltd | Superscape Ltd | | |
| 97 | Incognito Software | Великобритания | | |
| 98 | Independent Creators | Россия | | |
| 99 | Independent Software | Великобритания | | |
| 100 | Indescomp S.A. | Испания | | |
| 101 | Indigo Group | Украина | Кривой Рог | |
| 102 | Individual Software | Германия | | |
| 103 | Individual Software Service | Jurgen Schumpich GmbH | Германия | |
| 104 | INDUG | Великобритания | | |
| 105 | Infected Software | Великобритания | | |
| 106 | Infernal Designs | missing | | |
| 107 | Inferno Software Inc | Россия | | |
| 108 | Infinite Imaginations | Великобритания | | |
| 109 | Infinite Software | missing | | |
| 110 | Infinite Software | Великобритания | | |
| 111 | INFO Soft [1] | Чехия | | |
| 112 | Infocom | | | |
| 113 | Infogrames | Atari Inc | | |
| 114 | Infogrames [FR] | missing | | |
| 115 | Inform Software | Великобритания | | |
| 116 | Informatyczno-Elektroniczna Spoldzielnia Pracy INEL | Польша | | |
| 117 | Infosoft [2] | Россия | | |
| 118 | Infosoft Group | Россия | Рыбинск | |
| 119 | Infotek Group | Россия | Екатеринбург | |
| 120 | Infotek Team | Россия | | |
| 121 | Ingelek Jackson | Ediciones Ingelek S.A. | Испания | |
| 122 | Inmensa Bola de Manteca | | | |
| 123 | Inmensa Bola de Manteca (IBM) | | | |
| 124 | Innercore Group | | | |
| 125 | Innosoft | Великобритания | | |
| 126 | INPUT | Marshall Cavendish Ltd | | |
| 127 | Input Magazine | | | |
| 128 | Inside Law | Россия | Воронеж | |
| 129 | Insiders | | | |
| 130 | Insiders (ZX) | | | |
| 131 | Insight Software | Великобритания | | |
| 132 | Instant Products | Великобритания | | |
| 133 | Instituto de Ciencias de la Educacion | Universidad de Extremadura | | |
| 134 | Integer Research | Великобритания | | |
| 135 | Intellicreations Inc | | | |
| 136 | Intelligent Design Ltd | Великобритания | | |
| 137 | Intelligent Software Ltd | Великобритания | | |
| 138 | Intentions Matrix Crew | Россия | Чебоксары | |
| 139 | Interactive Software People | I.S.P. Marketing Ltd | | |
| 140 | Interactive Technology | Великобритания | | |
| 141 | Interbit Software | Венгрия | | |
| 142 | Interceptor Group | | | |
| 143 | Interceptor Software | Interceptor Group | | |
| 144 | Intercomputer Inc | | | |
| 145 | Interface Publications Ltd | Великобритания | | |
| 146 | Intergalactic Robots Ltd | Великобритания | | |
| 147 | International Business S.A. | | | |
| 148 | International Publishing & Software Inc | Канада | | |
| 149 | International Publishing & Software Inc | Канада | | |
| 150 | Interplay Productions Inc | Соединенные Штаты Америки | | |
| 151 | Intersoft Software | Великобритания | | |
| 152 | Interstella Software | Великобритания | | |
| 153 | Intraset Ltd | Великобритания | | |
| 154 | introspec | | | |
| 155 | Intruders Corp | Россия | Курск | |
| 156 | Invaders8 | Россия | Рязань | |
| 157 | Investronica S.A. | Испания | | |
| 158 | inward | | | |
| 159 | inx | | | |
| 160 | Inxs Software | Польша | | |
| 161 | Io Software | Великобритания | | |
| 162 | Ionis Software International | Германия | | |
| 163 | Ioshua S.A. | Испания | | |
| 164 | IPC Magazines Ltd | Великобритания | | |
| 165 | IQ Services | Великобритания | | |
| 166 | Iqisoft | Югославия | | |
| 167 | Iron boyz | Россия | Арзамас | |
| 168 | Iron Byte | Уругвай | | |
| 169 | Iron Falcons | Украина | | |
| 170 | Ironguys | Россия | | |
| 171 | Irrlicht Project | | | |
| 172 | IS-DOS Support Team | Россия | Балашов | |
| 173 | ISC Ltd | Великобритания | | |
| 174 | Island Records | | | |
| 175 | Isolated House | Великобритания | | |
| 176 | Istari Design | Испания | | |
| 177 | Istituto Geografico De Agostini S.p.A. | | | |
| 178 | ITS Software | Antique Master Ltd | | |
| 179 | Ivan Benishek | Сербия | | |
| 180 | Ivan Berg | | | |
| 181 | Ivan Berg Software Ltd | missing | | |
| 182 | Ivan Roshin | | | |
| 183 | Ivan Sanchez Jorda | Испания | | |
| 184 | Ivanovsoft | Россия | | |
| 185 | Iveson Software S.A. | Испания | | |
| 186 | Ivysoft | Великобритания | | |
| 187 | IZ Software | Великобритания | | |
