"Soft" part of our development process is handling with: JIRA (which supports our processes & workflows), Confluence (as a knowledge base) & Slack (not only as a collaboration tool, but also as an integration platform for various bots - ChatOps). We use Slack to ask for optimal peer code reviews, create new test environments, etc. We keep UI/UX designs in InVision .
Another way we help show you from the very beginning what things may look like, and make changes accordingly. InVision
Invision provides interactive mockups that are used during sales meeting. InVision
We use zeplin as an interface between designers, developers and stakeholders for sharing, improving and discussing designs InVision
All wireframes & mockups for new features & updated features are stored, commented & revised via InVision. InVision
Since we are fully distributed team, we must use these kinds of tools for collaboration. This one is used for UI/UX InVision
[Monthly cost] We use this tool to prototype designs quickly and gather feedback. InVision