Downloadable software for analyzing, profiling, transforming, converting, validating, testing, and managing legacy mainframe applications, computer code, data structures, job control language files, and related software artifacts; downloadable software for application inventory, dependency mapping, code analysis, complexity assessment, runtime behavior analysis, data profiling, performance profiling, functional equivalence testing, and validation of converted software; downloadable software for migrating, modernizing, and deploying legacy mainframe applications to cloud, distributed, and off-mainframe computing environments; downloadable computer software featuring artificial intelligence for generating application source code based on analysis of software runtime execution behavior, data profiling, and customer-defined target software architectures; downloadable computer software featuring artificial intelligence for the transformation and re-architecture of legacy mainframe application source code into modern application architectures, including microservices, event-driven, command query responsibility segregation (CQRS), hexagonal (ports and adapters), layered, serverless, and application programming interface (API)-driven architectures.