Please note that the popularity and reliability of websites can change over time, so it’s a good idea to verify this information with more recent sources. Here are a few websites that were known for their left-wing perspective:

1. La Jornada: La Jornada is a well-known left-leaning daily newspaper in Mexico that covers a wide range of news, including politics, culture, and social issues.
2. Proceso: Proceso is an investigative journalism magazine that often takes a critical approach to political issues. While it’s not strictly left-wing, it has been known for its independent and critical reporting.
3. Sin Embargo: Sin Embargo is an online news outlet that covers politics, human rights, social justice, and other issues from a progressive perspective.
4. Regeneración: Regeneración is an online news portal associated with the National Regeneration Movement (MORENA), a left-wing political party in Mexico.
5. Contralínea: Contralínea is an investigative magazine that focuses on issues such as corruption, social justice, and human rights. It often takes a critical stance toward the government.
6. Desinformémonos: Desinformémonos is an independent media collective that provides news and analysis from a social justice and anti-capitalist perspective.
7. Revolución 3.0: Revolución 3.0 is an online platform that covers politics, culture, and social issues from a progressive viewpoint.