I was under the impression that Jackall is Hi-Lift, or vice versa. Jackall may be a common term used to describe a Hi-Lift type jack. A quick search online yeilded no links to any Jackall manufacturer - but did link me to Hi-LiftHi All:
There is a copy of the Hi Lift jack made in Canada called the "jackall." Although I have no personal experience with the "jackall" I've never heard a negative comment about the quality of it.