Gitea is a community managed lightweight code hosting solution written in Go. It is published under the MIT license.
Try it once I have an interesting public repository.

Roughtime is a protocol that aims to achieve rough time synchronisation in a secure way that doesn't depend on any particular time server, and in such a way that, if a time server does misbehave, clients end up with cryptographic proof of it.

“Rough” time synchronisation means that, at this stage, we would be happy with time synchronisation to within 10 seconds of the correct time. If you have serious time synchronisation needs you‘ll want the machinery in NTP or even PTP (which needs hardware support to do right). There’s no reason why Roughtime shouldn‘t be (almost) as precise as NTP, but the use cases that we have in mind for now don’t need much precision. For example, about 25% of certificate errors shown by Chrome appear to be caused by bad local clocks and we don't need much precision to fix that.

Found via Cillian O'Driscoll's fork https://github.com/odrisci/roughtime
See also https://github.com/oreparaz/vroughtime for a simple client written in C.

Found via a link on https://docs.gitlab.com/ee/user/ssh.html

ISLisp in JS/Go: Standards-compliant Lisp smaller than Common-Lisp.
Note that the on-line JavaScript version does not handle #x prefixes correctly.
Integers are also limited to 31 bit:
(expt 2 31) => -2147483648
in contradiction to https://islisp-dev.github.io/ISLispHyperDraft/islisp-v23.html#integer_class

Introduction to age, a “simple, modern and secure encryption tool (and Go library) with small explicit keys, no config options, and UNIX-style composability.”
The source code can be found at https://github.com/FiloSottile/age and the german Wikipedia has an entry https://de.wikipedia.org/wiki/Actually_Good_Encryption

For a long time, we were unhappy with having to care about security issues and Linux distribution maintenance on our various Raspberry Pis.
Then, we had a crazy idea: what if we got rid of memory-unsafe languages and all software we don’t strictly need?
Turns out this is feasible. gokrazy is the result.

Rclone is a command line program to sync files and directories to and from a number of cloud storage services, including
- Google Drive
- Nextcloud

An experimental implementation of tlsdate (https://github.com/ioerror/tlsdate) in Go.
WARNING: This software has not been reviewed. You probably shouldn't use it.

The blog has a number of articles related to Emacs, Org mode, Go.

Mark Chu-Carroll's blog covers many subjects, including mathematics, physics and programming. In this article he describes his design of a programming language suited for an editor (think about a more readable version of TECO's language).
As of 2021-06-21, the site cannot be reached. On 2021-12-22 it is on-line again.