This is an epic list of sites that all connect with or relate to the Steem Blockchain! Much thanks to @reggaemuffin for creating the list which I used as a foundation for this one, in his post Complete Guide to what is Steem(it). His 6th post on Steemit! To be clear, I have only included links to webpages external to steemit.com. I have not listed any discord servers, as another list entirely is in the works, until updates are finished you can feel free to add discord servers to the comments of this post: @torico's magickal list of discord servers.

^{(from: unsplash.com/@artnok)}

Front Ends for the Steem Block Chain - Variations on, and Mirrors of the Steemit Blogging App

Busy – Facebook like design for Steem
mspsteem.com - MSP Front End for Steem
steem.kr - Korean front end for Steem
Esteem – Mobile Steem Client for iOS and Android
SteemitStage.com - SteemitInc Mirror of Steemit (for testing out new features. Often works when steemit doesn't)
condenser.steemliberator.com

dApps - These decentralized applications serve a variety of purposes, built on top of the Steem Blockchain.

Utopian.io - For rewarding Open Source Developers via the Steem Blockchain.
chainbb.com - a Forum structured interface for Steem
SteepShot – An instagram like client for Steem
Dlive.io - Live Video Streaming platform for steem
d.tube - Video Platform like Youtube with Steem rewards
dsound.audio - Soundcloud like Platform With Steem Rewards
dmania.lol - An app for posting your favorite memes, funny pictures, gifs and videos.
zappl.com - A twitter/reddit mash-up, meant for short/quick sharing of media and links.
appics.com - a revolutionary social mobile APP that lets anyone without prior crypto-knowledge benefit from blockchain technology effortlessly. (Coming Soon, of the first SMT created)
passagex.com - Event-Ticketing Network - Being built on the Steem Blockchain
oneplace.media - A different way to view Steem Posts (it looks nice over there :)

Steem Communities and Initiatives

MinnowSupportProject.org - #1 Initiative for Helping New Steemians

mspwaves.com - 24/7 Radio Station via Minnow Support

BuildTeam.io - Most successful business on Steem, Developing Steem Based Apps

MinnowBooster.com - Upvote Bot, Delegation Services, Investment Tools
SteemVoter.com - Automated Voting Tool
SteemSports.com - Sports News Publishing Service

sndbox.co - A multimedia incubator that utilizes blockchain technology to empower impactful and creative projects worldwide.
promo-steem.com - Supporting Promoters of Steemit and the Steem Blockchain
steemmakers.com - SteemMakers is a community which focuses on uniting, helping and rewarding makers and DIYers on the Steem blockchain.
steemcleaners.org - A group of Steemians Dedicated to fighting Spam and Plagiarism
steemstar.net - 24/7/365 live streaming video \ audio network.
Sound Legion Records - Steem Based Music Initiative
steempixels.com - Decentralized Steem Powerfed Digital Canvas
smartsteem.com - Buy Votes, Sell Votes, Delegate for Profit Sharing
bescouted.com Photography Website \ Community with Steem Integration
steemshelves.com - Digital Bookshelves, for Steem fiction
steemfiles.com - Buy or Sell digital content for Steem Dollars
steemitchocolate.com - Buy chocolate with SBD
steemfreelancers.com
steem.cards - Buy Giftcards with your Steem and SBD!!!!! (pretty incredible if you ask me
agoric.co - Official website of @agoric.systems with a built in Steem account creation faucet

Different Sites for Viewing information about the Steem BlockChain.

steemnow.com - Lists your most recent votes, rewards, and pending payouts
SteemD – See all internal data for anything on the blockchain
steemdb.com - Another Block Explorer like steemd, with a variety of additional features.
steem.rocks Similar to steemd, also including potential rewards
steemworld.org - Gives you all sorts of stats and info about your (or any) account
steemsql.com - a publicly available Microsoft SQL database containing all the Steem blockchain data
steemreports.com - All sorts of information about the blockchain such as who votes for who, who delegates to who, lots of great info not available easily elsewhere
SteemStats – Here you can watch users and get live updates
steemistry.com - Still under Development,currently features a mentions checker, keyword search, and a blockexplorer.
Steemviz – Livefeed of what happens on Steem, and other tools.

Phist – See the history of any post
mentions.steemdata.com – See who mentioned you
Steem Followers - Simple app to check followers
steem.supply - A steem Rewards Calculator
steemspectacles.com - a really awesome site that shows you interesting statistics about your account, which is currently down, but will be back soon :)
SteemitBoard – Achievements for Steemit
steemit.pics - Check images from a steem profile\blog
SteemWhales – See the biggest accounts on Steem. Includes many other features, including the ability to create a post.
SteemDown – See what whales power down
Downvote Viewer - Watch flag wars - Live
Who muted me?
blocktivity.info - A Listing of Blockchains. Ordered by amount of Transactions
steemblockexplorer
steemfollower.com - A website for receiving notifications about various happenings on the steem blockchain
Steem Rain -a visual experience of transactions on the Steem Blockchain

Apps that help Curators

sydneyitguy.github.io/understeemed/ - A cool looking tool for finding undervalued posts (may be very helpful for curators
steemsearch.com - Another curation tool, I'm told is even more awesome
https://steemfilter.space

Steem Games

pacman.steemliberator.com - Play Pacman for free, get tiny amounts of steem awarded(it's just fun, don't go crazy about getting money for playing a free game)
lucksacks.com - Largest Cryptocurrency Freeroll Poker Site in the World. Play Poker, earn Steem
steempunk.net - MMORPG Built on Steem

Steem Tools

steemprojects.com - A community maintained collection of tools and apps for steem
steemtools.com - a website with a number of useful tools for Steem
steemvoter.com - an automated voting tool, to automatically support users you love
steemitworldmap.com - A way to view steem posts based on where they were created.
steempi.com - An OS for RasberyPi that includes a bunch of tools and apps for steem
SteemLink – A Steem based URL shortener
SteemVids – See the latest videos on Steem
Vessel – Secure Desktop wallet for Steem
blockbrothers.io - Website For Steemify: IOS Notifications app for Steem
steem.global - Steed Node and Steem Faucet
SteemWatch – Configure notifications for events you are interested in
AskSteem – Search Engine for Steem
SteemSplit – Split the reward of a post with other users
SteemVids Create – Easy youtube video embed to your post
steembottracker.com - A service that keeps track of bidbots so you can use thier services with more information.
paywithsteem.com – Buy goods with Steem
steemauto.com - Automate activities on steem such as Schedule post, Build a Fanbase, or leave a curation trail

3rd Party Account Creation

steemcreate.com - A site you can buy a Steem Account with a Credit Card
steeminvite.com - A tool to enable you to create accounts for friends with a delegation.
AnonSteem - Anonymous Steem Account Creation
BlockTrades Account Creation

Steem Related Exchange, Pricing, and Trading Services

blocktrades.us - Quickly Exchange Digital Currency
BitShares - Decentralized Exchange. Predecessor of Steem
Steem TradingView – Realtime Steem price chart with candles
SteemCap – See the Steem Market cap live
coinmarketcap.com/currencies/steem/#markets - This link tells you the price of steem on various exchanges.
coingecko - steem
SteemDollar – Liveticker on Steem price compared to other currencies

Helpful \ Informative Links:

steemian.info - a site of helpful information for steemians
Steemithelp - a wonderful site linking to many helpful posts
http://howtosteemit.com - Simple Instructions for Steemit
steem.center - a Steem Wiki

Libraries, Tools, and other Developer Resources

developers.steem.io Official Steem Developers Portal
buildwithsteem.com - A New Site for Helping Developers
SteemData – A MongoDB service to get Steem data from
geo.steem.pl - Available RPC Nodes
steemistry.com/nodes - another site for checking RPC nodes
Steem RPC Monitor - check on the health of various steem nodes
github.com/steemit/sc2-sdk SteemConnect2 SDK

github.com/steemit/steemconnect/wiki/OAuth-2 – How OAuth-2 works

github.com/VIM-Arcange/Steem.NET - A Microsoft .NET library for Steem API
github.com/Chainers/Ditch - C# SDK for Steem
SteemFeed – Steem Price SDK for python
SteemSnippets - - A collection of snippets for steem programming
github.com/hackerwhacker/SteemJS - A collection of steemjs utilities
Steem – The blockchain Github

SteemJS – Javascript SDK for Steem
SteemPython – Python SDK for Steem

SteemTools – Extra Utilities for SteemPython

Piston – Python SDK for Steem

PistonCLI – Command Line Interface for Steem

SteemJ – Java SDK for Steem

https://github.com/Steem-FOSSbot/ - FOSSbot AutoVoter
http://steem.esteem.ws/ - Interactive Steem API UI
github.com/agoric-systems/agoric.co - Steem account creation faucet
testnet.steem.vc - A testnet setup to be as close as possible to the main steem network
github.com/steemit/lineman - A workaround for apps that rely on defunct steemd.steemit.com RPC
github.com/jnordberg/rpcit - A command line tool that lets you speak with steemd, jussi and all the other Steemit JSON-RPC services.
Steem BlockChain Database Service

Witness Info and Resource

Conductor – Manage your Witness Node
SteemMonitor – Monitoring App for Witnesses
steemian.info/witnesses
steemd.com/witnesses
steemdb.com/witnesses - this also has a witness section to your profile page
steem.bitcoiner.me/schedule/?c=show200 - another link with witness informaton (such as the order they are witnessing in currently)
privex.io - Secure Private VPS and Dedicated Server Hosting

(by @creativesoul)