Hello!
I've noticed that user BitkeysOrganization runs a site, bitkeys.org, which offers various tools for working with Bitcoin.
They make it look like that the tools were developed by themselves and don't hesitate to openly ask for donations.
In fact, the tools offered on their site are stolen and stripped of copyrights:

https://bitkeys.org/bulkchecker - http://www.homebitcoin.com/easybalance/easybalance.html
https://bitkeys.org/bitkeys - https://bitaddress.org
https://bitkeys.org/BIP39Mnemonic - https://iancoleman.github.io/bip39/
https://bitkeys.org/transaction - https://coinb.in

It's okay to republish open-source code, but replacing the copyrights and inserting your own donation address isn't.
When I posted in their original thread, they quickly removed it and made a new one.

Additionally, there might be backdoors inserted by them to snoop on users' private keys.

Oh nice, that's the reason why the experienced users recommend staying clear from online wallet services.
The problem is that you offer an overpriced service of vanity address generation without even knowing the basics.
For example, you have no idea about split-key vanity address generation which is actively used today, as it doesn't require anyone to be trusted.

If your so-called 512 GB flash drive was bought off ebay, beware that it might be fake and actually only be 4GB or so, overwriting the extra data.

STOP USING THE PHONE RIGHT NOW!
By installing apps on it, you're just going to overwrite the data on your flash storage, and that significantly
 increases your chances to lose the data.

Instead, you need to dump your flash into an image and dig that further (that still might require rooting your phone).
You also can contact a professional data recovery service, or dump the flash chip manually with a programmer, but that's a very advanced level.

I don't trust this guy nor the cryptocoin.
As an altcoin developer, they must be horribly incompetent: https://bitcointalk.org/index.php?topic=1948346.

Uh, and with all the above said, you've developed your *own* cryptocoin?!
You must be horribly incompetent, why would people trust your piece of crap?

Uh, if you remember having an e-mail linked to it then it must've been a webwallet.
Many online wallets have closed since, so your only chances are if you still have a backup.
Do you remember making one or writing your private keys down somewhere?

Please clarify, what do you need?
Where is your wallet file, and what do you want to do with it exactly - the last post is somewhat confusing.

First of all, DO NOT USE BRAINWALLETS! LOTS OF BITCOINS HAVE BEEN STOLEN FROM THE WEAK AND EVEN SOME HARD ONES!
EVEN THE WORDS FROM AN OBSCURE POEM HAVE BEEN GUESSED - YOU WERE WARNED.

There are two kinds of brainwallets: simple SHA256 (horribly insecure!) and those using a hardened key derivation function.
The hardened ones are way harder to bruteforce and thus are recommended instead of the simple ones.

Brainwallets of the first kind can be generated using bitaddress.org. IT IS STRONGLY RECOMMENDED TO RUN IT OFFLINE ON A LINUX LIVE USB! ALSO, NEVER COPY-PASTE PRIVATE KEYS AND I MEAN IT - FUNDS WERE STOLEN THAT WAY BY MALWARE.
See the warning above, you really don't want to use that way of generating a wallet, even if you're determined to do so.

If you are still sure you have a secure passphrase - personally I'd recommend using WarpWallet: https://keybase.io/warp/warp_1.0.8_SHA256_5111a723fe008dbf628237023e6f2de72c7953f8bb4265d5c16fc9fd79384b7a.html (download the page, run offline, see above).
Make sure to use a salt, and write it down along with the passphrase.
Also, you might want to back that page up in case you'll want to recover your funds later when the site goes down.

Good luck and again, don't use brainwallets. DON'T.

Ethereum seems to be held together with band-aids. I am sure that there must be some bad private keys as it's an emerging technology with lots of bad implementations, and actually an Ethereum address is just hex(Keccak256(pubkey)[12:]), where pubkey is an ECDSA public key, which is represented as 32-bytes for x and 32 bytes for y (just the good old uncompressed public key with the first byte removed) - also easy to calculate and to make a bloom filter for.

Yes. For this, you'll need to sweep the private key into your wallet (note: you'll have to pay the TX fee if you want to do this, you can optionally just import it if you don't want to pay the fee, but that's not recommended).
Open Electrum, and if you are going to create a new wallet, make sure to remember the seed!
Then sweep the private key: Wallet -> Private keys -> Sweep...
REMEMBER TO ENCRYPT THE WALLET WITH A SECURE PASSWORD AND DO NOT COPY THE SEED TO YOUR CLIPBOARD. DO NOT STORE THE SEED ON ELECTRONIC DEVICES.
DO NOT LOSE YOUR SEED. WRITE IT ON TWO PIECES OF PAPER AND MAKE SURE THAT NOBODY ELSE CAN READ THEM - IT'S RECOMMENDED TO STORE THEM IN A SAFE

Again, remember to make a backup of your (encrypted) wallet and the seed.
Treat the seed as your private key and never disclose it.

If my posts have helped you, please consider a small tip ↓

Well, you can try asking in the thread - they seem to be offering help, as I told you.
Good luck!

First - DO NOT USE  blockchain.info, they are untrustworthy and can steal your coins.
Webwallets are incredibly insecure. I recommend using Bitcoin Core or Electrum. Don't forget to encrypt your wallet with a strong password and to make backups!

Also, never, and I mean it - NEVER copy-paste your private keys! Write them down on a piece on paper instead.
You should also make a Linux (such as Ubuntu or Debian) live USB (even if you already have an installation - it may be infected!) and boot from it to do the following.

Your casascius coin should contain a so-called mini private key under the shiny holographic label, it's going to look like S6c56bnXQiBjk9mqSYE7ykVQ7NzrRy.
This is a mini private key, which can be converted to a normal WIF one in multiple ways.


One simple way is to use bitaddress.org (Wallet Details tab) and entering your mini private key there.
WARNING: Do not use it online. I recommend downloading the repo offline (https://github.com/pointbiz/bitaddress.org/archive/v3.3.0.zip) (download link for the zip linked at the bottom of bitaddress.org).

After downloading the zip, unplug your Ethernet cable, and/or disconnect from the WiFi (make sure to disable it!).
Now, extract it in your home directory (you should be using Linux to follow the tutorial, didn't I tell you?), open it in a file explorer and double-click on the file named index.html)

Congratulations - you're running bitaddress.org offline.

Now open the Wallet Details tab and enter your mini private key there. Your address along with the WIF private key will be displayed, carefully write it down and double check.
You can then sweep this private key in your wallet of choice.

Tip: you don't need to do that if you are using Electrum, as it already supports mini private keys.

Seems like they have generated wallets offline, with hash-parameter links. (wrong).

Do you still have a bookmark with an Instawallet link?
The URL would be something along the lines of https://instawallet.org/#ABigBunchOfJumbledCharacters.
They were an horribly insecure online wallet, and got hacked (or that's just an excuse).

Anyway, see this thread: https://bitcointalk.org/index.php?topic=167215, which was created by the developer of Instawallet.
Don't post your wallet link there, though.

I know this amazing service: https://bip32jp.github.io/english/createp2sh.html, which supports custom scriptSig/scriptPubkey spending.
AFAIK, it supports both testnet and mainnet.

Look, try typing the entire key. Upper/lower case matters, so 5MyPrivateKey[...] is not the same as 5myprivatekey[...].
Also, don't use blockchain.info, they are well-known for being hacked multiple times - coins were stolen. I'd suggest using and offline wallet such as Bitcoin Core (bitcoin.org) and importing the private key there.
Also, make sure to protect your wallet with a strong password, it's trivial for malware to steal your coins. If you use Windows, I'd also suggest doing this on a Linux live USB (try Ubuntu).

I am feeling lucky, why not participate?

v

As the title says, I wrote an efficient P2SH vanity address generator which can make any script have a vanity address by altering a nonce field that must be added first.
I can generate any script address, such as a multisig one, or something even more sophisticated.
I offer this service only to raise interest in vanity P2SH addresses, so don't expect anything extraordinary.

The way this works is provably safe - you supply a script with a nonce field, which is simply some space to locate the nonce value in it (8 bytes).
For example, you can generate any multisig script you want, replace one public key with 04 <65 zero bytes>, which would serve as the nonce, and send it to me.
I generate you a vanity address, which corresponds to the script you sent me, but with the nonce field altered.
That way, if you want to make a 2-of-3 vanity multisig script, you make a 2-of-4 one, with an all-zero public key in one place.

This basically implements this idea: https://bitcointalk.org/index.php?topic=255245.0.

I'll generate you a max. 5-6 character address for 0.015 BTC.
Remember, again, that this is just a way to raise interest, so don't expect this to be a viable service.

I'll release the program (open source, very very alpha, Linux only) if three people ask me to generate an address for them.

That still means the same RIPEMD-160 hash, so yes.

Hello!
I am quite experienced in bare Python programming and general use of Linux.
If you need help with something written in Python, such as fixing your code, getting that program to run or something in this scope, feel free
 to post there or write me a PM.

I also can help compiling source code (if it doesn't succeed for some reason or you don't know what to do).
Please note that my level of experience is hobby-intermediate, so I might not be able to help with especially hard stuff, but if you just need something
 general described above, I'll be glad to help you for some BTC, or even for free if your request is particularly easy.