Rudra Yamala Tantra is part of the Bhairava Agama canon of Shaivism as well as Tantric canon of Shaktism.
Shiva Sadakshara Stotram is found in the famous Rudrayamala Tantra text. Shiva Shadakshara Stotram is a powerful Lord Shiva prayer addressed to the six lettered mantra of Shiva – the 'Om Namah Shivaya”.