diff --git a/README.md b/README.md
index b2d0dd6..cf6ac57 100644
--- a/README.md
+++ b/README.md
@@ -9,34 +9,35 @@ This project implements a client library for the
 [OpenPGP card](https://gnupg.org/ftp/specs/OpenPGP-smart-card-application-3.4.1.pdf)
 specification, in Rust.
 
-The project consists of two crates:
+The project consists of a number of crates:
 - [openpgp-card](https://crates.io/crates/openpgp-card), which offers an 
-  implementation-agnostic OpenPGP card client API. It can be used with any 
-  PGP implementation.
+  implementation-agnostic, relatively low level OpenPGP card client API. It 
+  can be used with any PGP implementation.
 - [openpgp-card-sequoia](https://crates.io/crates/openpgp-card-sequoia),
-  adds functionality to conveniently use the openpgp-card library with
-  [Sequoia PGP](https://sequoia-pgp.org/).
+  adds a higher level API and functionality to conveniently use the 
+  openpgp-card library with [Sequoia PGP](https://sequoia-pgp.org/).
+- [openpgp-card-pcsc](https://crates.io/crates/openpgp-card-pcsc),
+  a backend to communicate with smartcards via pcsc.
+- [openpgp-card-scdc](https://gitlab.com/hkos/openpgp-card/-/tree/main/scdc),
+  a backend to communicate with smartcards via an scdaemon instance.
+- [openpgp-card-tests](https://gitlab.com/hkos/openpgp-card/-/tree/main/card-functionality),
+  a testsuite to run OpenPGP card operations on smartcards.
 
 **Acknowledgements**
 
-This library is based on the 
+This project is based on the 
 [OpenPGP Card spec](https://gnupg.org/ftp/specs/OpenPGP-smart-card-application-3.4.1.pdf),
 version 3.4.1.
 
 Other helpful resources included:
-
-The free [Gnuk](https://git.gniibe.org/cgit/gnuk/gnuk.git/)
-OpenPGP card implementation by [gniibe](https://www.gniibe.org/).
-
-The Rust/Sequoia-based OpenPGP card client code in
-[kushaldas](https://kushaldas.in/)' project
-[johnnycanencrypt](https://github.com/kushaldas/johnnycanencrypt/).
-
-The [scdaemon](https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=tree;f=scd;hb=refs/heads/master)
-client implementation by the [GnuPG](https://gnupg.org/) project.
-
-The [open-keychain](https://github.com/open-keychain/open-keychain) project,
-which implements an OpenPGP card client for Java/Android.
-
-The Rust/Sequoia-based OpenPGP card client code by 
-[Robin Krahl](https://git.sr.ht/~ireas/sqsc).
\ No newline at end of file
+- The free [Gnuk](https://git.gniibe.org/cgit/gnuk/gnuk.git/)
+  OpenPGP card implementation by [gniibe](https://www.gniibe.org/).
+- The Rust/Sequoia-based OpenPGP card client code in
+  [kushaldas](https://kushaldas.in/)' project
+  [johnnycanencrypt](https://github.com/kushaldas/johnnycanencrypt/).
+- The [scdaemon](https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=tree;f=scd;hb=refs/heads/master)
+  client implementation by the [GnuPG](https://gnupg.org/) project.
+- The [open-keychain](https://github.com/open-keychain/open-keychain) project,
+  which implements an OpenPGP card client for Java/Android.
+- The Rust/Sequoia-based OpenPGP card client code by 
+  [Robin Krahl](https://git.sr.ht/~ireas/sqsc).
\ No newline at end of file