Page Comparison

Custom Space User Management (CSUM) was adopted in early 2017, and enables Confluence space administrators to manage custom Space groups and memberships in their space, as well as managing specific delegated groups as well

Project User Management (PUM) is a port of CSUM to JIra, again enabling Jira project admins to manage custom Project groups and memberships in their project, as well as managing specific delegated groups as well

Switch User (SU) is available cross-product and enables administrators to take on the identity of users for problem solving (e.g. permission validation for a user by being that user)

Enterprise Mail Queue (EMQ) for JIRA allows outbound JIRA notifications to be digested, reducing that flurry to a manageable level.  EMQ now integrates with JEMH (Server only)

Log Tailer is available cross-product, and is simple add-on that exposes JIRA logs via HTTP, avoiding console access

/wiki/spaces/USRPROP/overview for JIRA provides a way for admins to create typed user properties, and enable those properties to be exposed through a component API to other add-ons (we use this in JEMH for user-specific HipChat rooms)

HTML Include Replace enables integration of 3rd party HTTP content (when inlining html, relative URLs are rewritten so as to fix images etc)

Asciimath (CASCII) and Latex (CLATEX) are historic add-ons for Confluence that continue to be free, maintained for compatibility but not actively developed.