I was about to mention AustLII http://www.austlii.edu.au/ which has been around for about 20 years. I hadn't heard of WorldLII and CanLII; seems they're part of a network.
And it looks like AustLII was where it started; the WorldLII contacts are all AustLII people.
WorldLII is great in theory but trying running some searches. The results are not nearly as good as just an aggregation of all the national "LII" systems would be (e.g. CanLii)
http://www.worldlii.org/databases.html