The Selenium Foundation project includes a discrete JAR containing the OperaDriver class for Selenium 2. This was extracted from the 2.53.1 uber-JAR. For some reason, this was never published as an official artifact.
At this stage, there's probably no point in documenting this. Selenium 4 is now the standard, so it's highly unlikely that anyone will care about OperaDriver for Selenium 2.
The Selenium Foundation project includes a discrete JAR containing the OperaDriver class for Selenium 2. This was extracted from the 2.53.1 uber-JAR. For some reason, this was never published as an official artifact.