Top 6 Go Signing Projects

unipdf

12 1,941 7.0 Go

Golang PDF library for creating and processing PDF files (pure go)

Project mention: Library to convert HTML to pdf in Golang | reddit.com/r/golang | 2023-05-22

I'm not the person you asked, but what about: https://github.com/unidoc/unipdf
SignTools

22 1,029 4.6 Go

✒ A free, self-hosted platform to sideload iOS apps without a computer

Project mention: Has anyone tries SignTools? I found this while browsing GitHub and it looks interesting. | reddit.com/r/sideloaded | 2023-05-09

There are two components to self-hosting SignTools, the web frontend, and the actual signing server, the latter of which must be run on macOS. Fortunately there's a guide to set it up so that you use GitHub Actions as the signing server, which gives you a certain amount of free minutes per month. I've never gotten close to the limit, even when I'm signing a few dozen apps. The guide also shows you how to set up the web frontend on Railway, which also offers free monthly credits, so you can actually self-host both components for free: https://github.com/SignTools/SignTools/blob/master/INSTALL-SIMPLE.md
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gitsign

8 805 7.8 Go

Keyless Git signing using Sigstore

Project mention: Signing Git Commits with Your SSH Key | news.ycombinator.com | 2022-09-13

You may want to check out https://github.com/sigstore/gitsign! You can generate ephemeral x509 code signing certs for free using Sigstore.
(disclosure: I'm a maintainer for gitsign)
smimesign

2 518 0.0 Go

An S/MIME signing utility for use with Git

Project mention: Signing Git Commits with Your SSH Key | news.ycombinator.com | 2022-09-13

I believe GitHub's smimesign can use RFC3161 timestamps:
How to specify a timestamp server
https://github.com/github/smimesign/issues/47
quill

1 188 10.0 Go

Simple mac binary signing from any platform (by anchore)

Project mention: quill: a tool for signing and notarizing darwin (mac) binaries written in go | reddit.com/r/golang | 2022-10-24
quorum-key-manager

0 36 3.1 Go

A universal Key & Account Management solution for blockchain applications.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2023-05-22.