If you have Stata or SPSS you can use Andrew Hayes' Process makro which you can download here (free software): http://www.processmacro.org/

Thanks Cornelia, 

I have the PROCESS macro. But it doesn't do multilevel mediation yet. I heard such macro should be available this month.  

Guy

oh, sorry, I thought the macro is already released

Hi Guy, you could use R (Mediation package).

Tingley, D., Yamamoto, T., Hirose, K., Keele, L., & Imai, K. (2014). Mediation: R package for causal mediation analysis.

Thank you

STATA GSEM can do (version 13 and higher). Or use R.

Check out this new macro for SPSS: https://njrockwood.com/mlmed/

Thanks, Maxim. Looking forward to meeting you!

Ditto. :)

https://mvuorre.github.io/bmlm/articles/bmlm/bmlm.html