The tool is really easy to use with very minimal learning curve and I couldn't find a which can be low code tooling in lamda world . I think the tool is really is easier and flexible compared Mulesoft based on my experience.
Apache Camel - Apache Camel is a versatile open-source integration framework based on known enterprise integration patterns.
MuleSoft - MuleSoft provides an integration platform for connecting any application, data source or API, whether in the cloud or on-premises.
Software AG webMethods - Software AG’s webMethods enables you to quickly integrate systems, partners, data, devices and SaaS applications
Mule ESB - Connect with our lightweight powerful ESB. Build integrations for use cases ranging from legacy services with lightweight APIs to SOA re-platforming connectivity across the entire enterprise.
IBM App Connect - IBM App Connect is the all-in-one integration tool for connecting apps, integrating data, building APIs and acting on events
Plant an App - The speed of low-code at the power of custom coding