When I last used COBOL (early 90's) we had a heap of JCL, for sure, but the real-time system used CICS for everything. Is it still a thing? What's the FOSS so

When I last used COBOL (early 90's) we had a heap of JCL, for sure, but the real-time system used CICS for everything. Is it still a thing? What's the FOSS solution for transaction monitoring?