• http://mlss.cc/

These are the summer schools which are held regularly :

• CIFAR's Deep Learning And Reinforcement Learning Summer School : https://dlrlsummerschool.ca
• Machine Learning Summer School (by Max Planck Institute, Tübingen) : http://mlss.cc/
• Lisbon Machine Learning Summer School : http://lxmls.it.pt
• Gaussian Process Summer Schools (by University Of Sheffield) : http://gpss.cc/
• Data Science Summer School (by École Polytechnique) : http://www.ds3-datascience-polytechnique.fr/
• Deep Learning Indaba Summer Schools : http://www.deeplearningindaba.com
• Summer Schools on Computer Vision And Machine Learning (by IIIT Hyderabad) : http://cvit.iiit.ac.in/summerschoolseries/
• Resource Aware Machine Learning Summer Schools (by TU Dortmund) : https://sfb876.tu-dortmund.de/GK/index.html
• Artificial Intelligence and Games Summer Schools : http://school.gameaibook.org/

• Will Sheffield organize a Gaussian Processes Summer School in 2018?
• Videos of Deep|Bayes – Summer School on Bayesian Deep Learning
• Best deep learning/ML summer schools of 2018

• My first summer school (TMLSS 2018)
• An Insider's Look Into The Summer School Training The World's Top AI Researchers (CIFAR DLRL Summer School 2018)
• 2018 Deep Learning And Reinforcement Learning Summer School (CIFAR DLRL Summer School 2018)
• Lisbon Machine Learning Summer School Highlights(LxMLS 2018)
• [Field report] Data Science Summer School at Ecole Polytechnique (with Bengio, Russell, Bousquet, Archambeau and others)(DS³ 2017)
• 6 things I learned in the deep learning summer school (DL Summer School 2015)
• Attending the Lisbon Machine Learning Summer School (LxMLS 2014)