Sinecoin is a cryptocurrency using scrypt-adaptive-N as a proof-of-work algorithm. Block rewards vary along a sine wave, which ensures that even as the base block reward gets lower, it will still be worthwhile to mine.

Specifications:

5 minute block targets
block reward halves every 315k blocks (~3 years)
~100 million total coins
100 coins per block, varying according to a sine function
Difficulty retargets every block with Kimotos Gravity Well algorithm
For sinecoin.conf : "addnode = 76.2.52.105"
There is a small premine, roughly ~0.99%, to fund development/promotion.

Ports:

RPC: 32713
P2P: 32714

Wallets:
Windows: https://github.com/sinecoin/sinecoin/releases/download/v1.0/sinecoin-qt.7z

Social Media:
Twitter: https://twitter.com/Sinecoin
Reddit: http://www.reddit.com/search?q=sinecoin