OCHA has many web platforms (probably too many!) Below is a simple guide highlighting the PRIMARY audience and PRIMARY purpose of the sites managed by OCHA on behalf of the humanitarian community and a few that are specifically for OCHA staff.
MS word document with all sites, March 2018 (if you update this please share!)
HDX - humanitarian data exchange
Audience: field and technical headquarters
Purpose: an open platform for sharing data related to a humanitarian response
H.id - humanitarian ID
Audience: field level
Purpose: for contact management and as a single sign-in for many humanitarian response related platforms
Site with link
Audience: text
Purpose: text
OPS - on-line planning/project system
Audience: field level responders
Purpose: For organizations in a humanitarian crisis to coordinate their implementation responsibilities and peer-review their funding requests
FTS - Financial tracking service
Audience: field and HQ
Purpose: a centralized source of curated, continuously updated, fully downloadable data and information on humanitarian funding flows.
CERF - Central emergency response fund
Audience: field and HQ
Purpose: is a humanitarian fund to promote early action and response to reduce loss of life, enhance response to time-critical requirements, and strengthen core elements of humanitarian response in underfunded crises
OCHAnet
Audience: OCHA staff
Purpose: Site for all internal OCHA documents and staff sites (UMOJA, Inspira, LMS)
Inspira
Audience: OCHA staff
Purpose: E-performance, work plan, mid-year and end of year reviews
OCT - contributions tracking systems
Audience: OCHA staff
Purpose: OCT tracks all contributions received from donors to OCHA's annual extra-budget as well as all contributions to 'Specially Designated Contributions'