Uses Vamps (V1.0.2 requires Vamps V0.98) for requantization. The author seems to primary target at full DVD copies. Unfortunately I have not tried any version >1.0.0 yet.
Quoted from its home page: "DVD backup tool for the GNOME desktop". Does not use Vamps, but demuxes, requantizes with tcrequant and remuxes with mplex. Haven't tried it yet. Would be interesting to know, how it deals with A/V sync. Probably considerably slower than qVamps.