The Pi Network, to which I have been a part of for some time now referred by a now new fellow Steemian 
First of all, you have to know Pi Network isn't yet on its main net phase, and although it has close to 13 million members, the token isn't being traded yet and therefore its a project in its early phases.
Well, if you want an invite, you can use the code "rukkanova" without the quotes as your invite code, and you can get in.
Now that you're in, let me tell you about the Brainstorming section.
The Brainstorming Section: Propose Ideas, Get Funded!
As all blockchains in their early days, the Pi ecosystem is still empty, and the developers and community are actively looking for new projects to finance.
I have already submitted my own project, which is a blockchain game, and I invite you to do the same since if you back your project up you can get voted and funded.
Those who got too late to the Steem or Hive Party and want to tackle a new blockchain project should probably look towards Pi and give it a try.
You just need to formulate your project by explaining it to the community via a post, and the community can vote and donate towards it in the brainstorming section, which is nice.
So far my project has a whopping 80% "Yes" vote going on and it bodes well.
If You Don't Want to Pitch a Project Mine Pi While It Isn't Launched and Mining Rate is High
Pi has an interesting mechanism in which the mining rates get smaller and smaller as new users join the blockchain.
Mining is just being active in the platform, and it doesn't consume any power or resources - it's done server-side.
I have been halved some times now, but I was fortunate to start 2 cycles ago.
Now the mining rate is still high, and worth it to create an account there just for the passive mining - it mines while you're logged off even.
Hey, it's free crypto, what's not to like?
In Conclusion:
The Brainstorming section is a great way to get your project read and funded, and because I'm invested in Pi I ask everyone who aims to create a new blockchain project to do it there as we need to develop this ecosystem of this 13 million + members blockchain.
Again, you can use "rukkanova" as an invite code to sign up using an invite of mine.