Pure Go PDF library (no CGo): create, edit, sign, encrypt, render to image, fill AcroForms, PDF/A, Markdown⇄PDF, PDF→HTML/SVG, AI copilots. MIT. Mirrors Aspose.PDF for .NET API.
Pure-Go Opus codec (RFC 6716), zero cgo. A bit-exact port of libopus, differential-tested against the C reference: the decoder passes all 12 RFC conformance vectors, and the CELT encoder produces byte-identical packets.
gengo is a zero-dependency Go library for generating random test data No configuration, no boilerplate. Just fast, reliable random data whenever you need it.
Filesystem notifications and advisory file locks for Go. Pure Go, no cgo, no dependencies beyond golang.org/x/sys. inotify, fanotify, kqueue, ReadDirectoryChangesW and polling behind one API, each verified on real hardware.
Build filesystem images in pure Go — ext4, squashfs, EROFS, FAT, exFAT, ISO9660, UDF, cpio, QCOW2 and more. No root, no cgo, no shelling out, zero dependencies, reproducible by construction.
Pure-Go LLM tokenizer and tiktoken-compatible token counter for OpenAI BPE, WordPiece, SentencePiece, Gemini, Llama, Mistral, and Hugging Face adapters.