Fnisri SG-004A
Was looking at the much cheaper SG-003, but the 004 has more features and, at the time, was on special offer. I previously acquired a Fnisri 2031 mini scope and thought it a bit rubbish (manual triggering is restricted to 10ms/div range or faster, weirdly) so was a bit apprehensive about the 004. I think it must be someone elses badged kit because, despite the lack of English-speaker's proofreading of the labels, it's actually pretty good! The user interface is, er, 'interesting' and needs a good perusal of the manual to get it to do anything, but it seems reasonably accurate on input and output.
One of the interesting things you can do is conversion between input and output. You can, for instance, set the input range of, say, 1V to 5V (4V span) and have that drive the output range of, say, 10ohm to 100ohm (90ohm span) and it will do it perfectly. Any of the input modes can be used to drive any of the output modes, so knocking up a quick test rig should involve less messing around than normal.
Edit: In case you're perhaps wondering what this signal generator actually does, anywhere else it would be called a process calibrator.