Here are some nasal consonants:
French has [m], [n] and [ɲ]
Catalan and Italian have [m], [n], [ɲ] as phonemes, and [ŋ] as an allophone.
Spanish has [m], [n], [ɲ] as phonemes, and [ɱ] and [ŋ] as allophones.
French and Portuguese have nasal vowels. In IPA, nasal vowels are indicated by placing a tilde (~) over the vowel in question. So French sang = /sã/.
See: phonetics, stop, fricative, affricate, approximant, International Phonetic Alphabet.