Headspace student discount: https://www.headspace.com/studentplan
Stop, Breathe & Think: https://www.stopbreathethink.com (Some free meditations)
Insight Timer: https://insighttimer.com (Free)
Calm: https://www.calm.com (very popular)
Smiling Mind: https://www.smilingmind.com.au/smiling-mind-app (Free)
Oxford MBCT: https://oxfordmindfulness.org/news/oxford-mbct-app/ (Free)