org.apache.camel.spi
Interfaces 
BrowsableEndpoint
ClassResolver
ComponentResolver
DataFormat
EndpointStrategy
ExceptionHandler
ExchangeConverter
ExchangeFormatter
FactoryFinder
FactoryFinderResolver
HeaderFilterStrategy
HeaderFilterStrategyAware
IdempotentRepository
Injector
InstrumentationAgent
InterceptStrategy
Language
LanguageResolver
LifecycleStrategy
NamespaceAware
PackageScanClassResolver
PackageScanFilter
Policy
Provider
Registry
RouteContext
ServicePool
Synchronization
TraceableUnitOfWork
TransactedPolicy
TypeConverterAware
TypeConverterRegistry
UnitOfWork
Enums 
HeaderFilterStrategy.Direction