Pseudomonas aeruginosa is oxidase positive (OXI+).
Other examples of oxidase positive bacteria (medically important) are:

• Neisseria meningitidis
• N.gonorrhoeae
• Moraxella catarrhalis
• Campylobacter jejuni
• Bordetella pertussis
• Haemophilus influenzae
• Vibrio cholerae
• Aeromonas hydrophila
• Pasteurella multocida

Oxidase test (Wikipedia).