Publishing papers for free in journals like IJSRET, IJSET, IJRTSSH, or indexing them in the ABCD Index depends on the policies of these platforms. Here's a general overview:  IJSET may also charge for publication. IJSRET typically charges a publication fee, but you can check their website or contact them directly Many open-access journals, including IJRTSSH, usually charge fees to cover processing costs.ABCD Index is not a journal but an indexing platform for journals and publications. Journals sometimes have special campaigns for free publication. 

Here’s an overview of free publication opportunities in the engineering field concerning IJSRET, IJSET, ABCD Index, and IJRTSSH:  IJSRET may charge a nominal fee for publication. You can check if they offer free publication options for specific cases (e.g., high-quality research or waivers for students). IJSET may charge article processing fees. However, some journals waive fees for authors in developing countries or under promotional offers. Role: ABCD Index is not a journal but an indexing service. Free Journals: You can browse their directory to find indexed journals offering free publication. Website: Explore their resources at ABCD Index. Visit the journal's website at ijrtssh.com for submission guidelines, publication fees, and the latest updates.