Dogecoin

Symbol - DOGE

Algorithm - Scrypt

Total Coins - 100 billions

Block Time - 1 minute

Coins per Block - [0 - 1,000,000] (random)

Coins per Block are halved every 100,000 Blocks; fixed 10,000 coins reward after Block #600,000

Difficulty Retarget every 4 Hours / 240 Blocks

First Block mined on December 8, 2013

Status - Alive
Official Website
Download Windows Client (May not be the latest version!)
Download Linux Client (May not be the latest version!)
Download Mac Client (May not be the latest version!)
Source Code
Download Mining Package (Read the README.txt!)
Profitability Calculator
Mining Pools - NetcodeDogePool | Scryptpool | Dogechain Pool
Exchanges - Vircurex | Cryptsy | CoinedUp
Block Explorer
Forum
Announcement Thread
Reddit
IRC Channel
Faucets / Free Dogecoins - Dogecoin Barker | Doge For You | Doge Coin Faucet
Shops - Shibe Shop | One Slim Tea
Dogecoin. Very scrypt. Such random. Much profit. Wow. Many coin

Litecoin

Symbol - LTC

Algorithm - Scrypt

Total Coins - 84 millions

Block Time - 2.5 minutes

Coins per Block - 50

Coins per Block are halved every 840,000 Blocks

Difficulty Retarget every 2,016 Blocks

First Block mined on October 8, 2011

Status -Alive
Official Website
Download Windows Client (May not be the latest version!)
Download Linux Client (May not be the latest version!)
Download Mac Client (May not be the latest version!)
Source Code
Download Mining Package (Read the README.txt!)
Profitability Calculator
Mining Pools - WeMineLTC | LiteGuardian | Coinotron
Exchanges - Vircurex | Cryptsy | mcxNOW
Block Explorer
Forum
Announcement Thread
Reddit
IRC Channel
Faucets / Free Litecoins - Litecoiner | Litecoin Faucet | Coin of Midas
Shops - Litecoin Store
The first cryptocoin to use the scrypt algorithm