The Critical Appraisal Skills Programme (CASP) has produced a series of checklists designed to help you read and question different types of studies in healthcare.
The Joanna Briggs Institute Critical Appraisal Tools
The MMAT is a critical appraisal tool that is designed for the appraisal stage of systematic mixed studies reviews, i.e., reviews that include qualitative, quantitative and mixed methods studies.
Research Skills and Critical Thinking online tutorials