Here are top 5 platforms from where you can do courses in different sectors without spending money:-

Platform	Is it Actually Free?	Best For	Verdict	Official Link
SAP Learning	Partially Free	SAP ERP, S/4HANA, Finance (FICO), Supply Chain (MM/SD), HR (SuccessFactors), ABAP, BTP	SAP Learning Journeys and many introductory courses are free. However, SAP Learning Hub, hands-on practice systems, and most certification exams require a paid subscription. Students at eligible universities can get a free Student Edition. (SAP)	https://learning.sap.com
Salesforce Trailhead	100% Free	CRM, Salesforce Admin, AI, Agent force, Cloud, Business Apps	Completely free learning platform with modules, projects, badges, and hands-on practice. Only official Salesforce certification exams are paid. (Trailhead)	https://trailhead.salesforce.com
IBM Skills Build	Free	AI, Cybersecurity, Data Science, Cloud, Professional Skills	Thousands of free courses and learning paths. Many digital credentials are free, though some advanced certifications may have separate requirements depending on the program.	https://skillsbuild.org
Infosys Springboard	Free	Programming, AI, Data Science, Business, Soft Skills	Completely free learning platform under Infosys CSR initiative with courses, virtual labs, and certificates for eligible programs. (Infosys)	https://infyspringboard.onwingspan.com
HubSpot Academy	100% Free	Digital Marketing, SEO, Content Marketing, Email Marketing, Sales, CRM	All Academy courses and certifications are free. You only need a free HubSpot account. (HubSpot Academy)	https://academy.hubspot.com