The purpose of this Request for Proposals is to identify a suitable contractor to carry out maintenance and further development of the Health Equity Assessment Toolkit (HEAT and HEAT Plus) See detailed Terms of Reference and bidding instructions under “Documents” below.  Please note: it is NOT necessary to click on “Express Interest” on the top right-hand side of the screen. In order to inform WHO that you are interested in participating in this Request for Proposals, please follow the provisions of the RFP document below.