https://github.com/cflint/CFLint is a very useful tool for linting (validating) your CFML code, there is integration available for many IDE's or you can run it in standalone mode over your whole code base

here is a sample .cflintrc file which reduces the noise

{
	"rule" : [ ],
	"excludes": [{"code":"ARGUMENT_ALLCAPS_NAME"},{"code":"ARGUMENT_HAS_PREFIX_OR_POSTFIX"},
		{"code":"ARGUMENT_INVALID_NAME"},{"code":"ARGUMENT_IS_TEMPORARY"},
		{"code":"ARGUMENT_TOO_LONG"},{"code":"ARGUMENT_TOO_SHORT"},{"code":"ARG_DEFAULT_MISSING"},
		{"code":"ARG_HINT_MISSING"},{"code":"ARG_HINT_MISSING_SCRIPT"},
		{"code":"ARG_TYPE_ANY"},{"code":"ARG_TYPE_MISSING"},{"code":"AVOID_USING_ARRAYNEW"},
		{"code":"AVOID_USING_CFABORT_TAG"},{"code":"AVOID_USING_CFDUMP_TAG"},
		{"code":"AVOID_USING_CFINCLUDE_TAG"},{"code":"AVOID_USING_CFMODULE_TAG"},{"code":"AVOID_USING_CREATEOBJECT"},
		{"code":"AVOID_USING_DEBUG_ATTR"},{"code":"AVOID_USING_ISDATE"},{"code":"AVOID_USING_STRUCTNEW"},
		{"code":"COMPONENT_HINT_MISSING"},{"code":"COMPONENT_INVALID_NAME"},
		{"code":"COMPONENT_TOO_LONG"},{"code":"COMPONENT_TOO_WORDY"},{"code":"EXCESSIVE_ARGUMENTS"},
		{"code":"EXCESSIVE_FUNCTIONS"},{"code":"EXCESSIVE_COMPONENT_LENGTH"},{"code":"EXCESSIVE_FUNCTION_LENGTH"},
		{"code":"UNUSED_METHOD_ARGUMENT"}, {"code":"SQL_SELECT_STAR"},
		{"code":"EXPLICIT_BOOLEAN_CHECK"},{"code":"FUNCTION_HINT_MISSING"},{"code":"FUNCTION_TOO_COMPLEX"},
		{"code":"FUNCTION_TYPE_ANY"},{"code":"FUNCTION_TYPE_MISSING"},{"code":"GLOBAL_LITERAL_VALUE_USED_TOO_OFTEN"},
		{"code":"GLOBAL_VAR"}, {"code":"LOCAL_LITERAL_VALUE_USED_TOO_OFTEN"},{"code":"METHOD_INVALID_NAME"},
		{"code":"METHOD_IS_TEMPORARY"},{"code":"METHOD_TOO_LONG"}, {"code":"METHOD_TOO_WORDY"},{"code":"NESTED_CFOUTPUT"},
		{"code":"OUTPUT_ATTR"},{"code":"PACKAGE_CASE_MISMATCH"},{"code":"STRUCT_ARRAY_NOTATION"},
		{"code":"UNQUOTED_STRUCT_KEY"},{"code":"VAR_ALLCAPS_NAME"},{"code":"VAR_HAS_PREFIX_OR_POSTFIX"},
		{"code":"VAR_IS_TEMPORARY"},{"code":"VAR_TOO_LONG"},{"code":"VAR_TOO_SHORT"},{"code":"VAR_TOO_WORDY"},
		{"code":"SCOPE_ALLCAPS_NAME"}, {"code":"AVOID_USING_ABORT"}, {"code":"VAR_INVALID_NAME"},
	],
	"includes" : [ ],
	"inheritParent" : false
}

Analysis tools and Line Debuggers

https://www.fusion-reactor.com/

http://www.fusion-debug.com/

https://getcoldbug.com/