What would be a good website to use where multiple people can contribute to a "fund" that is paid after a condition is met / product delivered?

For example, I own a home automation hub. People can write apps for it that let them use a device (e.g. a Philips Hue lightbulb). If they can't code, they come to forums and request an app. It's up to someone to code it for them, which may not happen if the only people who owns that device can't code.

A bounty would let the user say "I own a FooTech remote that I want to use with the hub. I'm willing to pay $25 for the app". Other people could stop by and say "Yeah, I own that remote too. I pledge $10" until someone steps in and writes the app, then claims the bounty.

In a similar scenario, a developer could come in and say "I own a Baz Inc. light bulb. Who wants an app?" and people could "kickstart" the development by pledging an amount until the goal is met and the developer can then write the app.

If such a site doesn't exist, can you recommend other ways of achieving this idea?

EDIT: As this is product specific (i.e. the home automation hub example), a "formal" crowdfunding site might scare people off, so the easier to set up and start, the better. I was thinking of something like "Chip In", but that site no longer runs.

closed as off-topic by Izzy, Steve Barnes, Pathum Anjana, nidunc, Angelo Fuchs Feb 10 '15 at 10:12

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This question does not appear to be about software recommendations, within the scope defined on meta and in the help center." – Izzy, Steve Barnes, Pathum Anjana, nidunc, Angelo Fuchs
If this question can be reworded to fit the rules in the help center, please edit the question.

  • What about "Kickstarter". Is that too "formal"? – Marcel Feb 9 '15 at 7:39
  • @Marcel Kickstarter seems to be for bigger projects (e.g. games, hardware, big bits of software). A typical driver for this home automation hub (Ninja Sphere, if you're curious) would be 200-300 lines of code. In my mind, not big enough for a whole Kickstarter, but not small enough for a donations page (as those 200-300 lines of code could take a few weeks, depending on how much effort is required to control the hardware from software) – Grayda Feb 9 '15 at 11:16