Free universal database tool and SQL client

A browser automation framework and ecosystem.

APM, Application Performance Monitoring System

Jenkins automation server

CoreNLP: A Java suite of core NLP tools for tokenization, sentence segmentation, NER, parsing, coreference, sentiment analysis, etc.

Apache JMeter open-source load testing tool for analyzing and measuring the performance of a variety of services

PDFsam, a desktop application to split, merge, mix, rotate PDF files and extract pages