I'll try to answer your questions,
Didactor is developed by institutes for vocational training, a university, a broadcasting corporation and a couple of healthcare org's. The Mediator Group initiated Didactor. Over the last 2 years we've had four releases and about 4 people have worked on it fulltime since the start. A lot of others have contributed to the project parttime.
It does have a quiz module with 8 quiz formats and, with the built in editors, it takes a couple of minutes to create a new quiz and a couple of hours to create a new quiz format.
About the hardware: Didactor runs on a single server, it's database independent but most of the time people use MySQL.
About the costs: in the end, it all comes down to a price per user. It's true that Java is more diffcicult and has a stepper learning curve, but once you know it, you can develop just as fast as with PHP. The total cost of ownership is lower than with other ELO's, but of course the effect of open source comes into count here as well.
Didactor supports other languages, through a simple XML-file it takes about 30 minutes to set up other languages.
Comparisons and advocacy
IBM adopts open source educational software SAKAI
This discussion has been locked because a year has elapsed since the last post. Please start a new discussion topic.