Core utilities - zero dependency base library for JDK 25+

Email utilities - SMTP/SMTPS email sending with template support for JDK 25+

Event-driven architecture support - publish/subscribe pattern with virtual threads for JDK 25+

Feature toggle/flag support - grayscale release, A/B testing, dynamic configuration for JDK 25+

Functional programming utilities for JDK 25+ - Monads, Pattern Matching, Pipeline, Lens

Geographic utilities - coordinate transformation, distance calculation, geofence, GeoHash for JDK 25+

Graph data structures and algorithms - directed/undirected graphs, BFS/DFS, shortest path, topological sort for JDK 25+

OpenCode Base I18n - Internationalization message solution for JDK 25+

Image processing utilities - resize, crop, rotate, watermark, compress, format conversion for JDK 25+. Includes core image data types (Raster, PixelFormat) merged from opencode-base-image-core in V1.0.4.

IO utilities for file operations, resource loading, and stream processing

OpenCode Base Lock - Unified lock abstraction for local and distributed locks (JDK 25+)