As of my last knowledge update in September 2021, there are several organizations in India that provide free cleft surgery and care for poor children. Mission Smile is indeed one of them and has been actively involved in this cause. However, it's always a good idea to verify the current status and options available. Here are a few organizations that have been known to provide free cleft surgery for poor children in India:

1. Mission Smile: As you mentioned, Mission Smile is a well-known organization that provides cleft palate surgery and care to children in need.
2. Smile Train: Smile Train is a global organization that partners with local hospitals and medical professionals to provide free cleft surgery and comprehensive cleft care. They have a presence in India and have been actively involved in cleft treatment.
3. Operation Smile: While Operation Smile is an international organization, they have also been involved in providing cleft surgeries and care in India. They collaborate with local medical professionals and volunteers.
4. Goonj: Goonj is a social organization that focuses on various issues, including healthcare. They have initiated medical camps that include cleft surgeries for underprivileged children.
5. Rotary Clubs: Various Rotary Clubs in India have also been involved in supporting cleft surgeries and other medical initiatives for disadvantaged communities.
6. Government Hospitals and Initiatives: Some government hospitals and healthcare initiatives in India may also provide free or subsidized cleft surgeries. It's worth checking with local health authorities or clinics.

Please note that the availability of services and organizations' activities may have changed since my last update. I recommend contacting these organizations directly or researching online to get the most up-to-date information about free cleft surgery options for poor children in India. It's important to verify the authenticity and reliability of any organization before seeking their services.