| Cryptography | Provides lightweight cryptographic services for Inner Drive Technology applications. |
| DateTimeExtensions | Extends the DateTime class to provide support for related operations. |
| DateTimeOffsetExtensions | Extends the DateTimeOffset class. |
| IdtException | Class to bridge exception handling and exception reporting in the IDEA™ framework. |
| ResourceNotFoundException | Thrown when an expected runtime resource, like a display string, is not found. |
| Resources | Provides resources for the running assembly. |
| RsaCryptographyHelper | Methods to assist with RSA cryptography operations |
| TypeInfo | Contains methods for debugging and diagnostics. |
| UnitTestFixture | Base class for all Inner Drive unit test classes. |
| VersionInfo | Returns formatted strings containing information about the running application. |
| WrappedException | Wrapper for exceptions to allow sinks to use IdtException features. |
| XmlHelp | Provides methods to facilitate creating and consuming XML documents. |
| DateRange | Represents a range of time with a defined beginning and ending. |
| RangeT | Creates a minimal IRangeT implementation for any class that implements IComparableT |
| IRangeT | Represents a range of values that may or may not include the bounds of the range. |
| ISignData | Defines the methods used to sign data and to verify the signature |
| IWrappedObject | Indicates that the implementing class wraps some other Object for publication. |
| OrdinalWeekday | Represents the ordinal occurrence of a given weekday in a month. |
| VersionFormats | Chooses which items GetVersionString(VersionFormats) should display. |