| Name | Type | Package | Detail |
| ChainMapper | Class | mapred.lib | Detail |
| FieldSelectionMapReduce | Class | mapred.lib | Detail |
| IdentityMapper | Class | mapred.lib | Detail |
| InverseMapper | Class | mapred.lib | Detail |
| RegexMapper | Class | mapred.lib | Detail |
| TokenCountMapper | Class | mapred.lib | Detail |
| ValueAggregatorCombiner | Class | lib.aggregate | Detail |
| ValueAggregatorJobBase | Class | lib.aggregate | Detail |
| ValueAggregatorMapper | Class | lib.aggregate | Detail |
| ValueAggregatorReducer | Class | lib.aggregate | Detail |
