CatLight can monitor work items (tasks & bugs) in a TFS/VSTS project. It will notify you about the changes and show the current status in tray.

You can use existing work item queries to select tasks and bugs that you want to monitor. Choose one of two modes:

• Show all - use this for queries that should return empty result when everything is OK, and for queues of short-term work. For example: “Important open bugs”, “Urgent tasks”, “Bugs to verify today”, “Bugs to review”.
• Show changes - use this to track changes in long-term queues of work, like “My tasks”, “Backlog”, “Recent bugs”

Each query can have a different level of importance:

You will get a notification when new work item matches the query. Catlight tray icon will also change color and stay that way until you acknowledge the changes.

Dashboard will show a list of work item query results. In “show changes” mode, it will only show work items that have changed since last acknowledgment.

If you don't see the query that you need, create it in TFS/VSTS and then you can monitor it in CatLight. Any user can add queries to "My Queries" folder. You may need project admin permission to add it to "Shared Queries" to share it with the team.