| Name | Country | City | Rating | |
|---|---|---|---|---|
| Oak Forest Software, Inc. | 0.00 ±0.0 | |||
| Oakley Software | 0.00 ±0.0 | |||
| Occupational Awareness | 0.00 ±0.0 | |||
| Ocean Software | 0.00 ±0.0 | |||
| Oddware | 0.00 ±0.0 | |||
| Odesta | 0.00 ±0.0 | |||
| OHAUG | 0.00 ±0.0 | |||
| Oliver Cyranka | 0.00 ±0.0 | |||
| Omega Soft | 0.00 ±0.0 | |||
| Omega Software | 0.00 ±0.0 | |||
| Omnitrend Software | 0.00 ±0.0 | |||
| Onbase Co. | 0.00 ±0.0 | |||
| Ontario Educational Communications Authority | 0.00 ±0.0 | |||
| Opal Software | 0.00 ±0.0 | |||
| Optimized Systems Software, Inc. | 0.00 ±0.0 | |||
| Orange Cherry Software | 0.00 ±0.0 | |||
| Origin Systems | 0.00 ±0.0 | |||
| Orion | Poland | 0.00 ±0.0 | ||
| Orion Software | 0.00 ±0.0 | |||
| Orkus Software | 0.00 ±0.0 |
