Repost from Discord FAQ channel:

What is Semux?
Semux is a performant smart contract platform powered by the BFT consensus algorithm. It designed to be autonomous, open source, and driven by the community.
Its native cryptocurrency called SEM.
SEM has 3 main use cases: it is a fuel for running decentralised apps, it used in governance and BFT consensus algorithm (voting for delegates), it is a store of value and mean of payment.

Where do I get SEM?
1) The simplest way is to buy it in exchange: Stex.com, Citex.co.kr, Tokok.com, p2pb2b.io
STEX has the best liquidity on SEM/BTC pair: https://app.stex.com/en/trade/pair/BTC/SEM
2) You can earn it for free by contributing to the project. Check our #bounties channel or just help us building the software, close issues, report bugs. We do value community contributions.
3) Try to be helpful in Discord. We have a tip-bot

What wallet can I use?
You can always use latest version of semux-core wallet from the official repo: https://github.com/semuxproject/semux-core/releases/latest
It's available for Windows, Linux and macOS. Run semux-gui.bat if you're on Windows, or ./semux-gui.sh if you're on Linux or macOS.

Is there a list of public pools who share block reward with voters?
Yes, it's maintained by @nozzlez, you can find it here:
http://pool.7u.org/

Is there a light web wallet?
Yes, it's open source and developed by @witoldsz
Mainnet: https://semux.online/
Testnet: https://testnet.semux.online/

Is there mobile wallet for Android?
Yes, it's developed by @Phash
https://play.google.com/store/apps/details?id=de.phash.manuel.asw

Are there public API providers?
https://api.semux.online/ (mainnet, @witoldsz)
https://api.testnet.semux.online/ (testnet, @witoldsz)
https://www.sempy.online/api/ui/#/semux (mainnet, @mdodong)
How can I get some TESTNET coins to play around with smart contracts?
We have a testnet faucet here: https://www.semux.org/testnetfaucet
Testnet block explorer: https://testnet.semux.info/
Don't forget to run your wallet with --network=testnet flag.

I have an issue/question, whom do I contact?
#general is a good place to start, Semux community always ready to help you.
Core devs are: @semux @orogvany @honeycrypto @cryptokat

Useful links
Github: https://github.com/semuxproject/semux-core
Block Explorer: https://semux.info/explorer
Website: https://www.semux.org/
Twitter: https://twitter.com/semuxproject
Blog: https://medium.com/semux