Given that ELM lacks a skills assessment function for pretesting and posttesting, what third party t

Given that ELM lacks a basic skills assessment function for pretesting and posttesting, what third party software integrates with ELM and what kind of resources are available for such an integration? This function needs to provide the ability to create test item pools and assessments, host self-service assessments, pre-load mark schema, regulate the number of attempts allowed (with scoring options for multiple test attempts), and include pretests and (successful) posttests as requirements for course completion. This function would also need to provide individual and aggregate score reporting. Thanks in advance for any help you can provide!