These are the 11 countries that enforce compulsory voting (no India):
Argentina – Introduced in 1912.[21] Compulsory for citizens between 18 and 70 years old, non-compulsory for those older than 70 and between 16 and 18. (However in primaries, citizens under 70 may refuse to vote, if they formally express their decision to the electoral authorities, at least 48 hours before the election. This is valid only for the subsequent primary, and needs to be repeated each time the voter wishes not to participate.)
Australia – Introduced in 1924.[21] Compulsory for federal and state elections for citizens 18 years of age and above. The requirement is for the person to enroll, attend a polling station and have their name marked off the electoral roll as attending, receive a ballot paper and take it to an individual voting booth, mark it, fold the ballot paper and place it in the ballot box. The act does not explicitly state that a choice must be made, it only states that the ballot paper be 'marked'. According to the act how a person marks the paper is completely up to the individual. In some states, local council elections are also compulsory.[22] At the 2010 Tasmanian state election, with a turnout of 335,353 voters, about 6,000 people were fined $26 for not voting, and about 2,000 paid the fine.[23]
Brazil[24] – Compulsory for literate citizens between 18 and 70 years old. Non-compulsory for Brazilian Youth age 16-17 or over 70 or illiterate citizens of any age. A justification form for not voting can be filled at election centers and post offices.
Cyprus - Introduced in 1960.[21]
Ecuador – Introduced in 1936.[21] Compulsory for citizens between 18 and 65 years old; non-compulsory for citizens aged 16–18, illiterate people, and those older than 65.
LiechtensteinLuxembourg - Voluntary for those over 70.
Nauru - Introduced in 1965.[21]
Peru[25] – Introduced in 1933.[21] Compulsory for citizens between 18 and 70 years old, non-compulsory for those older than 70.
Singapore – Compulsory for citizens above 21 years old on 1 January of the year of election
Uruguay - Introduced in 1934, but not put into practice until 1970.[21]
In addition
Schaffhausen canton in Switzerland has compulsory voting - Introduced to Switzerland in 1904, but abolished in all other cantons by 1974.[21]
Thanks to
http://en.wikipedia.org/wiki/Compulsory_voting