Creative
Great service that connects you to local 3D printers to get 3D printing done without your own 3D printer
Website builder. Not cheap, but it's a pretty easy tool for creating stylish websites, including eCommerce functionality if you need that.
Another website builder but more focussed on eCeommerce
Royalty-free classical music for your campaign video.
Photos are a massive part of pulling together a crowd funding campaign and if you don't have access to Photoshop, the free GIMP editing software could be incredibly useful.
Marketing
If you want to start collecting an email list before your campaign, and then manage an email newsletter, MailChimp is great. And free until you grow into a sizeable business.
Find journalists in your product area.
Create Facebook share links, Twitter "tweet this" links, Google Plus share links, LinkedIn share links, Pinterest "pin this" links and email "mailto" links that will work anywhere — even inside emails.
Snooze emails and schedule emails to send later - great for the those campaign day one emails.
Helps you send out lots of customise pitch emails. Like a smarter version of mail merge.
If you're trying to find the direct email address for someone you want to pitch to, this might help. It doesn't always work but it's pretty clever.
(I've found this one decreasingly useful, but try:)
Returns 'valid' email addresses based on a given domain.
Schedule your social media posts to maximise their impact.
An app for reposting on Instagram.
A tool that lets you gather support for a project, and then it gets your supporters to automatically shout about you on social media all at exactly the same moment.
Other
Terms and Conditions Generator from Shopify
This is a really neat tool from Shopify, and you can use it for free even if you're not a customer. (Obviously you should get proper legal advice if you're starting a business but this could be a good starting point.)
Talking of proper legal advice, the Law firm Taylor Wessing provides loads of great advice here for start-ups, including more free legal document templates.
Not only can you see a detailed breakdown of your own Kickstarter progress, but you can search for all past and current projects and see how their funding panned out.
Bringing together makers in London. They host a range of excellent events and talks, although we would say that. And if you're looking to take your project further you can even get a desk or a studio here.