| Name | Description | Type | Package | Framework |
| Bitfield | Class | net.yacy.utils | Yacy | |
| crypt | Class | net.yacy.utils | Yacy | |
| cryptbig | Class | net.yacy.utils | Yacy | |
| CryptoLib | Tool functions to sign and verify files and generate keys Start with "java -cp classes de. | Class | net.yacy.utils | Yacy |
| disorderHeap | Class | net.yacy.utils | Yacy | |
| disorderSet | Class | net.yacy.utils | Yacy | |
| enumerateFiles | Class | net.yacy.utils | Yacy | |
| gzip | Class | net.yacy.utils | Yacy | |
| ListDirs | Class | net.yacy.utils | Yacy | |
| loaderCore | Class | net.yacy.utils | Yacy | |
| loaderProcess | Interface | net.yacy.utils | Yacy | |
| loaderThreads | Class | net.yacy.utils | Yacy | |
| nxTools | Class | net.yacy.utils | Yacy | |
| PKCS12Tool | Class | net.yacy.utils | Yacy | |
| SignatureOutputStream | A SignatureOuputStream is composed of a Signature and a OutputStream so that write()-methods first update the signature and then pass the data to the | Class | net.yacy.utils | Yacy |
| StartFromJava | Class | net.yacy.utils | Yacy | |
| tarTools | Class | net.yacy.utils | Yacy | |
| UPnP | Maps port(s) in LAN to port(s) in WAN vie UPnP. | Class | net.yacy.utils.upnp | Yacy |
| UPnPMapping | Class | net.yacy.utils.upnp | Yacy | |
| UPnPMappingType | enum UPnPMappingTypeContains types of mappings for UPnP. | Class | net.yacy.utils.upnp | Yacy |