diff --git a/journal/Readme.md b/journal/Readme.md
index 87a9bdb9a64fa9ef7f2afcf09df47e7ccf1cfcf0..d10b0fe7f472e6e32cf45b027a9567eeead5d2bc 100644
--- a/journal/Readme.md
+++ b/journal/Readme.md
@@ -24,3 +24,7 @@ _My choice: Jupyter_
 
 ## Module 4:
 
+* workflow environments: [Galaxy](https://galaxyproject.org/learn/advanced-workflow/), [Kepler](https://kepler-project.org/), [Taverna](https://en.wikipedia.org/wiki/Apache_Taverna), 
+[Pegasus](https://pegasus.isi.edu/about/),[VisTrails](https://www.vistrails.org//index.php/Main_Page), [Collective Knowledge](https://ck.readthedocs.io/en/v2.5.8/src/first-steps.html).
+
+Noted: [GUIX](https://guix.gnu.org/)
\ No newline at end of file