From this question of Quora:

Books:

- Deep learning (Yoshua Bengio, Ian Goodfellow and Aaron Courville) Draft chapters
- Neural Networks and Deep Learning

Speech:

Tutorials:

Online courses:

- Neural Networks for Machine Learning (Geoffrey Hinton)
- Deep Learning (Yann LeCun)

Papers:

- Deep Learning of Representations: Looking Forward (Yoshua Bengio)
- DEEP LEARNING: Methods and Applications (Li Deng and Dong Yu)

Websties:

Some collections: