Doubly Articulated Consonants

 Who has doubly articulated consonants in their conlangs, and which ones
do they have? I've been making minor adjustments to the phonology of my
in-progress conlang... basically, historical sound changes have got rid
of almost all codas in favour of quite a large number of possible
onsets, so I've decided to finish the job pretty much and demolish the
remaining codas completely. But wanting to keep the Nm cluster in some
way without allowing codas or making a screwy exception only for that
initial cluster (which doesn't pattern like the other remaining onsets)
I was thinking of including /Nm)/ which makes it an onset, and also
/gb)/. I'll probably exclude an unvoiced doubly articulated stop, since
the sound changes involved make producing that segment problematic.
 But anyway, back to my original question. Who's got doubly articulated
consonants in their conlang, which ones, and do you have any
distributional restrictions on them? Also, if you have a doubly
articulated consonant, for example /kp)/, do you contrast it with [kp]?

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