Stuff that won't due to naive IT215 handling: MilkyTracker, older XMP, open cubic player (note: all the samples here appear to be IT214 according to XMP so just changing the CMWT field to 0x0214 should do)
Stuff that won't load at all: libdumb (Audacious), timidity's MikMod
Stuff that is likely to crash: stock XMPlay 3.6 (unless they patched the main download)
Note: "loads fine" does not mean "plays fine". This uses filters, so a normal mikmod is NOT recommended.