UN Charter-based bodies:

Human Rights Council, Universal Periodic Review Working Group, Human Rights Council Advisory Committee.

UN Treaty-based bodies:

Human Rights Committee (CCPR), Committee on Economic, Social and Cultural Rights (CESCR), Committee on the Elimination of Racial Discrimination (CERD), CEDAW, CAT, SPT, CRC, CMW, CRPD, CED

Regional

Council of Europe: Human Rights

OAS: The Inter-American Human Rights System

Inter-American Commission, Inter-American Court

Africa, Islam, Asia, etc.

DPI-NGO Directory, UN Human Rights Library (NGO Links), Human Rights Links (NGOs), CIAO (working papers), etc.