Here are some prominent Jain temple trusts (mandir trusts) in India that are listed in Jain Knowledge directories. This is not necessarily an exhaustive list of every trust.

• Shri Ashok Gram Jain Temple Trust (Mumbai, Maharashtra). You can read more here
• Shri Kalikund Parshwanath Trust (Ahmednagar, Maharashtra). You can read more here
• Shri Chintamani Parshwanath Sumernagar Jain Trust (Borivali West, Mumbai). You can read more here
• Shri Shankheshwar Parshwanath Rajendra Jain Trust (location varies). You can read more here
• Shri Arihant Jain Aaradhak Trust (Dahisar-East, Mumbai). You can read more here
• Shri Vagad Visha Oswal Jain Trust (Dahisar East, Mumbai). You can read more here
• Shri Mahavir Swami Jain Shwetambar Murtipujak Derasar Trust (Jogeshwari East, Mumbai). You can read more here

Notes:

• This list reflects trusts that are currently present in Jain Knowledge’s directory. It may not capture every Jain mandir trust in India, and new trusts may exist or be formed after this response.
• If you want a broader, more up-to-date compilation, I can check the Jain Knowledge sitemap for more entries and compile a longer list from there.

If you’d like, tell me a specific region or city, and I’ll pull together a targeted list from the Jain Knowledge directory.