There are innumerable Slokas in praise of and as prayer to Bhagwan Sri Shiva who is called Maha Deva, the greatest of the Deities.
The prayers are composed in various Indian languages. A few of such slokas / stotrams are referred in this article.
Sri Shiva Panchakshara Stotram
Sri Dwadasha Jyotirlinga Stotram