The following acts cover various acts to cover maintenance to wife/children under various civil and criminal sections:
1. Hindu Marriage and Adoptions Act, 1956 (HAMA 1956)
Read Sec 18-28 related to maintenance to wives and children: HAMA 1956
2. Hindu Marriage Act 1955 (HMA 1955)
Read Sec 24-25 regarding maintenance pendente lite and permanent alimony: HMA 1955
Also, Sec 26 covers for custody, maintenance, and education of minor children.
3. CrPC 125 for maintenance for wife, children, parents.
4. Muslim personal laws and CrPC 125 applicability are explained here: http://www.crisp-india.org/laws/59-maintenance-acts.html