Skill Lists

Independence
Confidence
Problem Solving
Communication
Adaptability
Self-reliance
Enthusiasm
Appreciation of diversity
Perseverance
Open-mindedness
Assertiveness

Or if you would like to opt for phrases rather than single words:
Sensitivity to cultural differences
Proficiency in another language
Ability to identify and achieve goals
Increased self-awareness
Improved organizational skills
Increased patience
Learn through listening and observing
Establish rapport quickly
Take risks
Take initiative
Handle difficult situations
Cope with rejection

Around our study abroad center we use the term "transferrable skills" and stick with a set like this:
Communication
Interpersonal
Organizational
Intrapersonal
Adaptability
Leadership
Problem Solving
Assertiveness
Motivation
Willingness to learn
Teamwork