Some quick reviews of some of the products listed:
* Lighthouse (http://lighthouseapp.com) - Bug Tracker - good for keeping track of simple stuff last I used it (~2 years ago), but Github Issues obviated its use for me.
* Pivotal (http://www.pivotaltracker.com/) - Project Management - great tool, not trivial to keep well managed tho. Easy to let your project get out of hand with tons of tickets, requires some discipline in its use.
* Trello (https://trello.com/) - Project Management - simple, fast. Really great for keeping tasks focused on a small team, I'm not sure how it would suit a larger team though.
* Airbrake (http://airbrake.io/) - Error Handling - You didn't have this in your list, but it deserved a mention. It's okay for server side error handling, its client side stuff leaves something to be desired though. More often than not their hosted JS lags on load, causes your page load times to go up as well. Doesn't currently offer a supported hosted version.
* Stripe - (https://stripe.com/) - Billing & Payment Processing - Does just about everything right imo. Great documentation, great interface, website is well engineered. Analytics / reporting would be awesome tho.
* Intercom - (http://intercom.io/) - Support/Help Desks - I seriously love Intercom. For managing a team of people doing outreach to users, it is awesome. I view it as a fantastic tool for triaging retention.
* Uservoice - (http://uservoice.com/) - Support/Help Desks - You didn't mention them either, but I thought I'd add. They are pretty great, even for small companies. I think their sweet spot is a larger support team tho. Great interface.