I am looking for testing tools which are prominent in the banking and aviation sector so that I can be familiar with their working and utilization.
When it comes to banking and/or aviation my expectation is that the companies already have defined toolchains and frameworks and the exact tools differ from company to company. The only way of identifying is looking for current and historical QA roles requirements and take a look at the programming languages and tools which are in scope.
In general I don't think that tool really matters as it's just a "tool" and despite the differences they serve the same purpose.
Given you have good understanding of:
You should be able to pick up any programming language and any testing tool.
When it comes to some form of industry standards: