add some new 3rd party items

src/third-party.md

@@ -20,11 +20,13 @@ Snap it into your existing workflows with the click of a button, automate away t
 ### Cassandra installation tools
 * [Docker community Cassandra images](https://hub.docker.com/_/cassandra): Docker images for Apache Cassandra maintained by the Docker community
 * [DataStax Desktop](https://downloads.datastax.com/#desktop): Cross-platform (Windows, MacOSX, Linux) application that allows developers to quickly explore Apache Cassandra™ with a few clicks on their laptop, complete with tutorials and walkthroughs.
+* [K8ssandra](https://k8ssandra.io/): K8ssandra provides a production-ready platform for running Apache Cassandra on Kubernetes, including automation for operational tasks such as repairs, backups, and monitoring.
 * [The Last Pickle tlp-cluster](https://github.com/thelastpickle/tlp-cluster): tlp-cluster, a tool for launching Cassandra clusters in AWS (DataStax)
 
 ### Cassandra tools
 
- * [cassandra.link](https://cassandra.link): Curated site with tools, along with [cassandra.tools](https://cassandra.tools).
+* [Adelphi](https://github.com/datastax/adelphi): Authomation tool for testing open-source Cassandra using cassandra-diff, nosqlbench, and fqltool.
+* [cassandra.link](https://cassandra.link): Curated site with tools, along with [cassandra.tools](https://cassandra.tools).
 * [Cassandra Prometheus Exporter](https://github.com/criteo/cassandra_exporter): Standalone application which exports Cassandra metrics through a prometheus friendly endpoint
 * [DataStax Bulk Loader](https://downloads.datastax.com/#bulk-loader): Easy-to-use command line utility for loading and unloading JSON or CSV files to/from the database, counting rows in tables and identifying large partitions. 
 * [DataStax Metrics Collector for Cassandra](https://github.com/datastax/metric-collector-for-apache-cassandra): Based on Collectd, aggregates OS and Cassandra metrics along with diagnostic events to facilitate problem resolution and remediation
@@ -33,6 +35,7 @@ Snap it into your existing workflows with the click of a button, automate away t
 * [The Last Pickle Reaper](https://github.com/thelastpickle/cassandra-reaper): Automated repair tool for Apache Cassandra  (DataStax)
 * [The Last Pickle Cassandra stress tool, tlp-stress](https://github.com/thelastpickle/tlp-stress): A workload-centric stress tool for Apache Cassandra. Designed for simplicity, no math degree required. (DataStax)
 * [NoSQLBench](https://github.com/nosqlbench/nosqlbench): Pluggable benchmarking suite for Cassandra and other distributed systems
+* [Stargate](https://stargate.io): Open source data gateway providing Document, REST, and GraphQL APIs to Apache Cassandra.
 
 ### Cassandra Kubernetes operators