I suggest using the MoMA tool provided by http://www.mono-project.com/MoMA . I took the first one that you specified "QuickFix" and downloaded the binary version and viewed it using MoMA. The result was 273 method calls that were not implemented.
This may seem like a lot, but, like compiler errors, you fix a couple of things and the number goes fast, you also have good chances that the parts you need will be good, and with the QuickFix source you may be able to change the code by as needed or just throw some try {...} catch wrappers around those problematic functions that you need to use.
Of course, you can try the same in other available products, I just tried the first one. I believe that MoMA will also work on confusing code, so you can also test it on trial versions.
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