- OcAcpiLib — ACPI injector and patcher
- OcAppleBootPolicyLib — Apple bless protocol implementation
- OcAppleKernelLib — Apple kernelspace injector and patcher
- OcCompressionLib — Misc compression and decompression (LZSS, LZVN, ZLIB)
- OcAppleChunklistLib — Apple chunklist (e.g. for dmg hashes) handling library
- OcAppleImageVerificationLib — Apple EFI image signature verification lib
- OcBootManagementLib — Simple blessed-based boot management with UI
- OcCpuLib — CPU feature scanning
- OcCryptoLib — Misc cryptographic primitives (AES, RSA, MD5, SHA-1, SHA-256)
- OcDataHubLib — Apple-specific DataHub data configuration
- OcAppleDiskImageLib — Expose DMG as an UEFI RAM disk
- OcConfigurationLib — Deserialize OpenCore configuration
- OcDebugLogLib — Debug output redirection through OC Log protocol
- OcDevicePathLib — Device path management and transformation
- OcDevicePropertyLib — Apple device property protocol implementation
- OcFileLib — Supplemental file I/O
- OcFirmwarePasswordLib — Apple firmware password protocol implementation
- OcGuardLib — Basic sanity checking (static assertions, overflow maths)
- OcMachoLib — Mach-O image handling and transformation
- OcMiscLib — Miscellaneous stuff not fitting elsewhere
- OcPngLib — PNG image decoding
- OcRtcLib — CMOS memory access
- OcSerializeLib — PLIST document deserialization
- OcSmbiosLib — Apple-specific SMBIOS data configuration
- OcStorageLib — Resource storage abstraction (from e.g. FS I/O)
- OcStringLib — String handling and management
- OcTemplateLib — Data description and resource management
- OcTimerLib — EDK II timer library based on TSC
- OcVirtualFsLib — UEFI file system interception
- OcXmlLib — XML and PLIST reading and transformation