diff --git a/README.md b/README.md
index 84ad952..e7f7b5b 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,7 @@ A curated list of awesome data labeling tools
 * [TagEditor](https://github.com/d5555/TagEditor) - Annotation tool for spaCy
 * [SMART](https://github.com/RTIInternational/SMART) - Smarter Manual Annotation for Resource-constrained collection of Training data
 * [PIAF](https://github.com/etalab/piaf) - A Question-Answering annotation tool
+* [Annif](https://github.com/NatLibFi/Annif) - A multi-algorithm automated subject indexing tool for libraries, archives and museums
 
 #### Audio