My Service
Most Forkcoins can't be deposited to any trustworthy exchange yet. That means I can't really offer the service I want to offer yet, so I'll just keep this here until it becomes available. Gate.io takes Forkcoin-deposits, but it has many scam accusations and I don't trust it.
I can already offer my service for Bitcoin Cash, Bitcoin Gold and BitCore.

General note: never give your private key or word seed phrase to anybody! If you're not the sole owner of your private keys, you're not the owner at all!
If you want me to claim your forked coins for you, you're going to have to give me your private key(s). Now, read the sentence above this again. Are you confused yet? That was intentional to make you realize what you're about to do!

If you decide to use my services, notify me first. If it comes to the point where you're going to send me private keys, do not just PM them!
Before sending any private keys, move your Bitcoins to a new secure wallet! Also move the Forkcoins to a new address on as many forked chains as you can do on your own. This reduces the risk by securing the majority of your funds by yourself.

My fee is negotiable: make me an offer! Each address requires quite some work per fork, it won't be worth my time and the Bitcoin fees doing this for very small amounts.

Why trust me
Check LoyceV's Legendary Campaign/Services Portfolio to see what campaigns I have managed in the past.
Check Payments to see me share about $1220 after the June 2017 Byteball airdrop. Subsequent comments testify to this.
See my Trust summary (click "Untrusted feedback").
Check my staked address to see my account is not hacked.
Full disclosure: for LoyceV's Legendary 10 Month 10 Person 10 Altcoin Investment Experiment: STARTED I still have altcoins currently worth about $1600 entrusted to me.
If this isn't enough: you don't have to use my services, and you're still welcome to post comments!

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Updated instructions for this service: click here.

Looks like a pretty cool service, and thank you very much for all of the valuable info. Can I just send you a dump of all my used BTC addresses, can you scan for forked tokens, tell me which addresses have said tokens, and I send over the priv keys? I'd happily give you 5-10% of the value for your service.

I think I have many addresses that have claimable fork coins, but it does seem like a lot of work and I am terrible at tracking down change addresses. I use Core, which seems to generate many many change addresses and so I'm wondering if you would be willing to help me dig through my wallets to discover what stash is lying in wait.

I am positive I have a few addresses that were around for the BCH fork, which also seems to be the most profitable fork from what I can tell. Is there any easy way to keep track of Core's Change addresses or to easily take a snapshot of a particular date in time for your wallets for quick checking?

While I'm interested in the service, I do not want to waste either of our time and would like to do what I can to figure out where I'm at without completely doing everything for myself, since it sounds dreadful.

That's only a list of upcoming/past bitcoin hard forks.

Thanks LoyceV for this great guide on how are we going to claim those free coins out there.

Also good luck to your service.

(we've discussed this in PM)

General answer: Depending on how many different addresses you have, this can be quite a lot of work. Doing this manually means having to look up the balance for each address at the moment of each fork. For addresses with many transactions it's even more work to find back historic balances on a block explorer.
I don't mind looking into the occasional Bitcoin address, but if it's a long list of addresses with low balance, you'll have to do this on your own.

That list hasn't been updated in a month. I checked some of the websites, and they do offer wallets, but I haven't tested them yet.

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I can help you get started

As far as I know, there is no easy way to take such a snapshot in Bitcoin Core. It can export all addresses you ever used: type listaddressgroupings in Console for the list.

An easy way to get an estimate is if you can remember your approximate balance on August 1, 2017 (the fork date for Bitcoin Cash) and other major fork dates that happened after this. Each Bitcoin you had is worth around $1500 in Bitcoin Cash, plus more in other forks. This should quickly tell you whether or not it's worth the effort.

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Their main chain isn't launched yet.

If it includes Bitcoin Cash, you're talking about hundreds of dollars per address, so it'll be worth your time for sure

Most Forkcoins have dropped just like the rest of crypto recently, but Bitcoin Diamond went up 250% today! I still don't know a trusted exchange though, and the price varies from $7.44 at Gate to $148.73 at Kucoin. That means there's no arbitrage trading possible, the range is just rediculous.

@hugeblack, love Exodus, it's my favorite desktop wallet but I would not recommend to exchange larger amounts with their exchange feature because their exchange rates are pretty bad, I think they are taking a cut there.

Unfortunately, I don't have enough VM-space to sync their blockchain, so I can't test it.

I didn't test Gate.io after reading many scam accusations. Have you been able to successfully use it?

SuperBitcoin can be traded at Hitbtc and yobit and a few more shit exchanges.
As per coin market :- https://coinmarketcap.com/currencies/super-bitcoin/#markets
And this for Hitbtc:- https://hitbtc.com/sbtc-to-BTC

Thank you for making this thread!

Have you considered adding CLAMS to the list? While not really a fork of bitcoin, every bitcoin address above a certain (very small) balance in May 2014 received a fixed amount of CLAMS in an airdrop (like BTX, but there wasn't some form to claim it, the airdrop was entirely on-chain and all the outputs exist already). The amount is worthwhile and a few of my friends were surprised to find they had hundreds of dollars hiding in their old wallets when I told them about it, so it may be a useful addition to this list even though it's ancient.