diff --git a/README.md b/README.md
index 2f3ff3b..e72feba 100644
--- a/README.md
+++ b/README.md
@@ -61,10 +61,14 @@ A curated list of awesome malware analysis tools and resources. Inspired by
 
 ## Online Scanners and Sandboxes
 
+* [Cuckoo Sandbox](http://cuckoosandbox.org/) - Open source, self hosted
+  sandbox and automated analysis system.
 * [Jotti]() - Free online multi-AV scanner.
 * [Malwr]() - Free analysis with an online Cuckoo Sandbox instance.
 * [VirusTotal](https://www.virustotal.com/) - Free online analysis of malware
   samples and URLs
+* [Zeltser's List](https://zeltser.com/automated-malware-analysis/) - Free
+  automated sandboxes and services, compiled by Lenny Zeltser.
 
 ## Memory Forensics
 
@@ -89,6 +93,8 @@ A curated list of awesome malware analysis tools and resources. Inspired by
   network tools.
 * [Whois](http://whois.domaintools.com/) - DomainTools free online whois
   search.
+* [Zeltser's List](https://zeltser.com/lookup-malicious-websites/) - Free
+  online tools for researching malicious websites, compiled by Lenny Zeltser.
 
 ## Miscellaneous