Test and validate your robots.txt with this testing tool. Check if a URL is blocked, which statement is blocking it and for which user agent. You can also check if the resources for the page (CSS, JavaScript, images) are disallowed.

Testament is an advanced automatic unittests runner for Nim tests, is used for the development of Nim itself, offers process isolation for your tests, it can generate statistics about test cases, supports multiple targets (C, C++, ObjectiveC, JavaScript, etc), simulated Dry-Runs, has logging, can generate HTML reports, skip tests from a file, and more, so can be useful to run your tests, even the most complex ones.

espoofer is an open-source testing tool to bypass SPF, DKIM, and DMARC authentication in email systems. It helps mail server administrators and penetration testers to check whether the target email server and client are vulnerable to email spoofing attacks or can be abused to send spoofing emails.

Axe is an accessibility testing engine for websites and other HTML-based user interfaces. It's fast, secure, lightweight, and was built to seamlessly integrate with any existing test environment so you can automate accessibility testing alongside your regular functional testing.

When asked what stops them from safely and regularly deploying every change into production environments - everybody seems to have their own reasons. Organizational, cultural, historical, technical, contractual.. Some go as far into denial as saying : "Oh, we don't need continuous delivery. In fact most companies out there don't really need it." But the underlying reason is of course the lack of confidence. Nobody wants to be the culprit for a system outage. According to a number of industry surveys the average cost of one hour of downtime is around 75000 USD. There's a lot at stake! So instead we choose to move slower, to add controlled handoffs and build home-grown guardrails. To hire more Ops engineers and call them SRE to feel more secure. Rarely discussing the price of establishing and maintaining all of these over time.

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Engineers who've experienced true CD can't really fathom any other way of delivering software. As @giltayar puts it "CD ... is a total game changer. It changes how you perceive software development and delivering features... I did CD and EVERYTHING about how I developed changed. It was magical."

testssl.sh is a free command line tool which checks a server's service on any port for the support of TLS/SSL ciphers, protocols as well as recent cryptographic flaws and more.

Inject your own scripts into black box processes. Hook any function, spy on crypto APIs or trace private application code, no source code needed. Edit, hit save, and instantly see the results. All without compilation steps or program restarts.

WireMock is a simulator for HTTP-based APIs. Some might consider it a service virtualization tool or a mock server.

It enables you to stay productive when an API you depend on doesn't exist or isn't complete. It supports testing of edge cases and failure modes that the real API won't reliably produce. And because it's fast it can reduce your build time from hours down to minutes.

The Infection Monkey is an open source Breach and Attack Simulation (BAS) tool that assesses the resiliency of private and public cloud environments to post-breach attacks and lateral movement.

Geb is a browser automation solution.

It brings together the power of WebDriver, the elegance of jQuery content selection, the robustness of Page Object modelling and the expressiveness of the Groovy language.

It can be used for scripting, scraping and general automation — or equally as a functional/web/acceptance testing solution via integration with testing frameworks such as Spock, JUnit & TestNG.