Apps like Jira Data Center

Here are some great alternatives to Jira Data Center by Atlassian :
Mobile for Jira
Mobile for Jira
★3.4
Mobile for Jira Pro
Mobile for Jira Pro
★4.0
Rock: Messaging + Tasks
Rock: Messaging + Tasks
★4.3
Bitrix24 CRM And Projects
Bitrix24 CRM And Projects
★3.4
ActiveCollab: Work Management
ActiveCollab: Work Management
★4.6
Projectmates
Projectmates
★4.1
Intervals
Intervals
★4.3
Zenkit
Zenkit
★4.1
Avaza - Unified Team Work
Avaza - Unified Team Work
★4.0
ProjectPlace
ProjectPlace
★3.7
Flowlu
Flowlu
★3.6
OnStation
OnStation
★4.0
Today's Usage - Data Monitor
Today's Usage - Data Monitor
★3.8
WORKetc CRM + Projects + More
WORKetc CRM + Projects + More
★4.8
ProjectManager: Empower Teams
ProjectManager: Empower Teams
★3.7
Zoho Projects
Zoho Projects
★4.2