I'm not exactly sure what you are trying to build, it sounds a little vague. But I can tell you which application has helped my productivity the most - Slack.

I'm not exactly sure what you are trying to build, it sounds a little vague. But I can tell you which application has helped my productivity the most - Slack. Communication is the biggest roadblock for my developer experience. Unclear specs, asymmetric expectations, etc. Slack has significantly improved the ease and speed I can get feedback from teammates / product owners.