Programmer Hat
Check this link to see over 60 good reviews and testimonials on Programmer Hat's Shopify apps (https://apps.shopify.com/partners/programmer-hat). Long track record as an excellent app developer.
See on the Atlassian Marketplace.Programmer Hat Top Selling Addons
Basecamp Integration for Jira
Can do free custom integrations (email and ask). Integrate Jira and Basecamp. Sync Basecamp todos to Jira issues
Create Ticket Template, Issue Template, Easy Templates
Support can set everything up for you for free. Just email & ask. Issue Templates, bug templates, project management, task, story
Email This Issue for Jira
Support can set everything up for you for free. Just email & ask. Email issues to anybody, including external users
Rich Text Editor for Jira
Support can setup for free. Rich text editor to do math formulas, templates, markdown, variables, advanced search/find and replace
Mail Handler for Jira, Service Desk, Service Management
Support can do all setup for you (free). Create ticket from email, email to ticket, or create issue by email