diff --git a/README.md b/README.md
index 264be49..e1784c5 100644
--- a/README.md
+++ b/README.md
@@ -113,6 +113,7 @@ Repo mirrors:
 - [warmuuh/jemini](https://github.com/warmuuh/jemini/tree/main/gemini-client)(Java) - reactive gemini-client, part of jemini-project
 - [geminic](https://github.com/WarpEngineer/geminic) (Erlang) - An Erlang library for building Gemini protocol clients.
 - [dremini](https://github.com/marty1885/dremini) (C++) - Highly concurrent C++ Gemini server and client library
+- [Opal](https://github.com/aschuhardt/Opal) (C#) - Gemini client library for .NET 6.  Built-in support for TOFU and client certificates.
 
 ## Related Specifications
 - [GemPub Specification](https://codeberg.org/oppenlab/gempub) - Gempub, the Gemini e-book (and capsule archive) container specification.
@@ -199,6 +200,7 @@ Repo mirrors:
 - [certified](https://code.lag.net/robey/certified) (Python) - Generate TOFU TLS certificates for gemini servers.
 - [cl-yag](git://bitreich.org/cl-yag) (Common-Lisp) - Static site generator producing gemini, gopher and html.
 - [comitium](https://git.nytpu.com/comitium) (C) - A feed aggregator for gemini supporting many formats and protocols.
+- [gemini-antenna](https://notabug.org/tinyrabbit/gemini-antenna) (Python) - A feed-aggregator for Gemini, triggered by submissions.
 - [geminize](https://addons.mozilla.org/en-US/firefox/addon/geminize/) - Firefox addon that redirects gemini:// URLs and links to a customizable HTTP-to-Gemini proxy.
 - [gemlog.sh](https://git.nytpu.com/gemlog.sh/about/) (Bash) - Utility for writing and managing gemini logs (gemlogs) and atom feeds (simple gemini static site generator/framework).
 - [gem.git](https://git.sr.ht/~fkfd/git.gmi/) (Python) - git frontend CGI script.