This thread’ll be update through the year with FREE courses that lead to FREE certifications.
If we all grow, we all improve. 
Please help keep this thread updated throughout the year.
***** Updated 02 October 2023 *****
rVeeam]
Veeam University: Veeam surely.
https://www.veeam.com/free-on-demand-trainings.html
sKubernetes]
Free Kubernetes Training by Veeam, with 3 badges after completation: Apprentice, Defender, Helmsman
Kyverno is a policy engine designed for Kubernetes. With Kyverno, policies are managed as Kubernetes resources and no new language is required to write policies. This allows using familiar tools such as kubectl, git, and kustomize to manage policies. Kyverno policies can validate, mutate, and generate Kubernetes resources. The Kyverno CLI can be used to test policies and validate resources as part of a CI/CD pipeline.
https://learn.nirmata.com/courses/kyverno-fundamentals-certification/
pCybersecurity]
CYBER THREAT INTELLIGENCE 101
The arcX Cyber Threat Intelligence (CTI) 101 course is a short selection of content taken from arxX CTI Practitioner course and has been designed as a very basic introduction to cyber threat intelligence: Threat actors, the Intelligence lifecycle and legal and ethical considerations surrounding CTI. Totally worth!
https://arcx.io/courses/cyber-threat-intelligence-101
(ISC)² is offering a free entry level certification: Cybersecurity Certification.
https://www.isc2.org/Certifications/CC
For those residing in Ireland, there’s this program of journey into cybersecurity from Beginner to Advanced, with a certification at every stage. I think it’s an amazing opportunity.
Ec-council released a free essentials series for beginners who wants to jump into cybersec, with the possibility to get certificate in Network Defense Essentials, Ethical Hacking Essentials and Digital Forensics Essentials:
https://codered.eccouncil.org/essentials-series-bundle/
Linux foundation has many course with final examination and certificate
https://training.linuxfoundation.org/resources/?_sft_content_type=free-course
Pratical Network Penetration Tester (PNPT) by TCM full 50h FREE course
APIsec Certified Expert
The API Security Certified Expert and Foundamental course covers all the key topics to become an APIsec professional. This hands-on course provides detailed workshops on API hacking techniques and how to uncover vulnerabilities and logic flaws in APIs.
Offensive Security's live Pen200
is a scheduled and open streaming offering that will facilitate learning, improve engagement, and ultimately increase Offensive Security Certified Professional (OSCP) certification preparedness and achievement for those students enrolled in PEN-200.
https://www.offensive-security.com/offsec/offsec-live/
Ransomware Uncovered Specialist
ICTTF delivers a non-technical workshop outlining Cyber Threat Landscape, impact of Covid on Cyber Threats, Underground Economy of Cyber criminals, the Cyber Kill Chain and much more…
https://community.icttf.org/course/ransomware-uncovered-specialist-certificate
(Bonus without cert but super interesting)
Infosec Montly Challenge: Metasploit Framework, Secure and Insecure Protocols and Phyton are the topics of the month. Each path has a corresponding CPE credit.
https://www.infosecinstitute.com/skills/monthly-challenge-overview/
AttackIQ | Foundations of Purple Teaming
https://www.academy.attackiq.com/courses/foundations-of-purple-teaming
AttackIQ | Foundations of Breach & Attack Simulation
https://www.academy.attackiq.com/courses/foundations-of-breach-attack-simulation
AttackIQ | Foundations of Operationalizing MITRE ATT&CK v13
https://www.academy.attackiq.com/courses/foundations-of-operationalizing-mitre-attck-v13
aCloud]
For all the women of this community, the "AWS She Builds - SkillUp with CloudUp - Cloud Practitioner" event gives free course and free voucher for the exam AWS Cloud Practitioner certification:
https://pages.awscloud.com/cloudup-for-her-cloud-practitioner.html
Microsoft Virtual Training Days: “Foundamental level” free certification after 2 webinars.
https://www.microsoft.com/en-us/trainingdays
Jumpcloud core certification
Core certification validates the strong foundational knowledge needed to execute standard implementation, configurations, and daily operations across the JumpCloud platform.
https://jumpcloud.com/university/certifications/core
(Bonus)
If you are unemployed, this courses are for you. They give a full 360 knowledge about AWS.
https://aws.amazon.com/it/training/restart/
tVirtualization]
Thanks to
“The VMware Skyline Advisor Pro Technologist badge validates skills for supporting, managing, and planning environments through proactive monitoring and issue remediation. The badge holder helps organizations use VMware Skyline Advisor Pro to proactively avoid issues before they occur, increase network reliability and security, ensure peak performance, and reduce time-to-resolution for service requests.”
Free course + VMware Skyline Advisor Pro Technologist Certification after the course (with 70% of correct answers)
Programming]
Harvard University is offering python course for free (with optional certification), the life changing CS50P, and it started in April 2022:
https://www.edx.org/course/cs50s-introduction-to-programming-with-python
Python Free course and certification at FreeCodeCamp:
Redis Certified Developer is our professional certification program for software developers who regularly work with Redis. Earning this certification is a great way to ensure that you've achieved a high level of Redis mastery. You can also use this certification to demonstrate your Redis expertise to prospective employers.
https://university.redis.com/certification/
sAutomation]
The Dynatrace Master Certification is a journey that leads to industry recognition of your current skills, competencies, and experience through the demonstration that you are a true master of the entire Dynatrace platform.
https://university.dynatrace.com/overview#certification
tSecurity]
As a Kaspersky Certified Professional, I can only happily recommend the full course of training + exam that is free and very well made.
https://support.kaspersky.com/learning/certification
pMonitoring & Analytics]
A monitoring platform, with free course and exam with last certification.
https://www.sumologic.com/learn/training/
No need of presentation. Here’s Google Analytics folks.
https://analytics.google.com/analytics/academy/
A graph and analytics program with course and exam, plus a free t-shirt.
https://neo4j.com/graphacademy/neo4j-certification/
.Linux]
The Linux professional institute offers: book for the LPI Linux Essentials and relative LPI certification exam for free