add info about rust parser library

Other-Todo.txt-Projects.md

@@ -20,6 +20,11 @@ https://github.com/mNantern/QTodoTxt
 This is my favorite version--it has extensions where you can add due date, links, percent done, etc. 
 https://github.com/abztrakt/ya-todo-py
 
+# Rust
+
+There's also a [Rust version](https://github.com/kstep/todotxt.rs) of todo.txt parser.
+It is also available in [Crates.io](https://crates.io/crates/todotxt).
+
 # Cross platform
 
 [**Todour**](http://nerdur.com/todour-pl/) is a simple and fast GUI for Mac, Windows and Linux for managing a todo.txt list (written in C++/Qt)