Time in status for Jira Cloud: https://marketplace.atlassian.com/1220908
Timer field | SLA for Jira Cloud: https://marketplace.atlassian.com/1225684
Stopwatch field for Jira Cloud: https://marketplace.atlassian.com/1225685
Time between dates for Jira Cloud: https://marketplace.atlassian.com/1226143
Calculated and other custom fields(JBCF) for Jira Cloud: https://marketplace.atlassian.com/1221055
Fields panel for Jira Service Management (JSM): https://marketplace.atlassian.com/1226586
Display linked issues for Jira Cloud: https://marketplace.atlassian.com/1223203
User helper for JiBrok cloud apps: https://marketplace.atlassian.com/apps/1227296