Hello Bitcoiners

I will post here list of all BTC Accelerators, if i missed any please post it on reply.

What is Bitcoin Accelerator ?
Transactions with too low fee can take hours or even days to confirm, and sometimes never confirm at all.
But there are PAID and Free bitcoin transaction acceleration services available now which you can use to prevent your own transaction from getting stuck.

Free Accelerators :
ViaBTC
https://pool.viabtc.com/tools/txaccelerator/
It gives 100 transactions per hour, this will mostly be expired within first 5 minutes of each new hour. but if you had a chance to get your transaction submitted, it will has high chance to get it confirmed shortly.
1ink
http://1ink.cc/?view=transaction-accelerator
This tool was developed by 1ink.cc team for his users to confirm stuck payouts and deposits, but anyone else can use it. this will submit your transaction into 5 common accelerators at once, it could give fast results when many of included accelerators approve your transaction.
Confirmtx
http://confirmtx.com/
This is one of best free accelerators if your transactions has little inputs/ outputs. because it works only on small sized transactions.
Antpool
https://www.antpool.com/user/prioritiseTransaction.htm?m=savePrioritiseTx
Requires for users so sign up. They prioritize transactions based on fees (not suitable for users that use very low fees since they have to wait for a long time, prior for their transactions to be included in a block that they manage to mine).
Bitcointalk Helpers
There are good people ready to help you by confirming your transaction as possible.
All you have to do is posting your transaction ID on their topics.
here is list of topics which are approving transactions to confirm :
https://bitcointalk.org/index.php?topic=1943939
https://bitcointalk.org/index.php?topic=2634663

Paid Accelerators :
BTC.com
https://pushtx.btc.com/
One of best paid accelerators ever, you will get your transaction confirmed within next block, usually it takes less than 15 minutes to get it confirmed, this could be costly for many, but for urgent /high-amount transactions this service is best choice if you agree to pay more for your transaction confirmation.
ViaBTC
https://pool.viabtc.com/tools/txaccelerator/
ViaBTC also provide paid accelerator service for special cases such as urgency, extremely low transaction fee etc.
According to transaction size, a donation of 0.01 BTC or BCH per KB is required for each transaction. contact ViaBTC (support@viabtc.com) for details about paid accelerator.

If there is any missed Accelerators please post it as reply, i will add it into my list.

Best of luck!