Syscoin is a merge-minable scrypt coin which provides an array of useful services which leverage the bitcoin protocol and blockchain technology.

1 minute block targets, diff retarget each block using KGW(7/98)
128 SysCoin and regenerated network services fees (block reward decays on fixed schedule until rewards fixate at 32 Syscoin until 2bil coin, after which rewards are purely network and service fees). Please see https://bitcointalk.org/index.php?topic=587080.0 for the rewards schedule table in a nice to read table format.
2 billion total coins
Scrypt Proof-of-Work
Fast-response KGW difficulty adjustment algorithm
Merge mineable with any scrypt coin
Minable either exclusively or via merge-mining
Network service fees regenerated as subsidies