| Name | Description | Type | Package | Framework |
| AbstractContext | Abstract Context. | Class | ninja-core.ninja.utils | Spark Micro Web |
| Clock | Interface | ninja-core.ninja.utils | Spark Micro Web | |
| ClockImpl | Class | ninja-core.ninja.utils | Spark Micro Web | |
| CookieDataCodec | CookieDataCodec and CookieDataCodecTest are imported from Play Framework. | Class | ninja-core.ninja.utils | Spark Micro Web |
| CookieEncryption | This class encrypts/decrypts session cookie data. | Class | ninja-core.ninja.utils | Spark Micro Web |
| Crypto | Class | ninja-core.ninja.utils | Spark Micro Web | |
| DateUtil | Class | ninja-core.ninja.utils | Spark Micro Web | |
| HttpCacheToolkit | Interface | ninja-core.ninja.utils | Spark Micro Web | |
| HttpCacheToolkitImpl | Class | ninja-core.ninja.utils | Spark Micro Web | |
| HttpHeaderConstants | Yet another Http Header Constants file. | Interface | ninja-core.ninja.utils | Spark Micro Web |
| HttpHeaderUtils | Class | ninja-core.ninja.utils | Spark Micro Web | |
| LoggerProvider | Class | ninja-core.ninja.utils | Spark Micro Web | |
| Message | A pojo to be renderd as Json or Xml. | Class | ninja-core.ninja.utils | Spark Micro Web |
| MimeTypes | MimeTypes utils Adapted from play 1. | Class | ninja-core.ninja.utils | Spark Micro Web |
| NinjaConstant | Interface | ninja-core.ninja.utils | Spark Micro Web | |
| NinjaMode | Class | ninja-core.ninja.utils | Spark Micro Web | |
| NinjaModeHelper | Class | ninja-core.ninja.utils | Spark Micro Web | |
| NinjaProperties | Interface | ninja-core.ninja.utils | Spark Micro Web | |
| NinjaPropertiesImpl | Class | ninja-core.ninja.utils | Spark Micro Web | |
| NinjaPropertiesImplTool | Class | ninja-core.ninja.utils | Spark Micro Web | |
| NoHttpBody | This is a marker class used to handle Results in ResultHandler. | Class | ninja-core.ninja.utils | Spark Micro Web |
| ObjectMapperProvider | ObjectMapper is used in several classes. | Class | ninja-core.ninja.utils | Spark Micro Web |
| OverlayedNinjaProperties | Helper utility for handling Ninja properties using a simple overlayed view of them. | Class | ninja-core.ninja.utils | Spark Micro Web |
| ResponseStreams | Make sure to only write to either the OutputStream OR the Writer. | Interface | ninja-core.ninja.utils | Spark Micro Web |
| ResultHandler | Class | ninja-core.ninja.utils | Spark Micro Web | |
| SecretGenerator | Class | ninja-core.ninja.utils | Spark Micro Web | |
| SwissKnife | Class | ninja-core.ninja.utils | Spark Micro Web | |
| TimeUtil | Class | ninja-core.ninja.utils | Spark Micro Web | |
| XmlMapperProvider | This provider makes it simple to configure the XmlMapper in one place for all places where it is used. | Class | ninja-core.ninja.utils | Spark Micro Web |