Minor additions.
diff --git a/Projects.md b/Projects.md
index 69900ff..e3c2002 100644
--- a/Projects.md
+++ b/Projects.md
@@ -328,6 +328,7 @@
* [go-darts](https://github.com/awsong/go-darts) - Double-ARray Trie System for Go
* [GoLLRB](https://github.com/petar/GoLLRB) - A Left-Leaning Red-Black (LLRB) implementation of 2-3 balanced binary search trees in Google Go
* [go-stree](https://github.com/toberndo/go-stree) - A segment tree implementation for range queries on intervals
+ * [go-radix](https://github.com/armon/go-radix), [go-radix-immutable](https://github.com/hashicorp/go-immutable-radix) - Radix tree implementations.
* [gotree](https://github.com/gyuho/gotree) - Tree Visualization, Algorithms
* [gtreap](https://github.com/steveyen/gtreap) - Persistent treap implementation.
* [rbtree](https://github.com/yasushi-saito/rbtree) - Yet another red-black tree implementation, with a C++ STL-like API
