Here's a good roundup of the current freebets/offers available for Cheltenham.
Some absolute crackers in here
Daily offers
1) Ladbrokes bet £100 get £10 free - Stake £100 or more from 12th February 2015 00:00:00 to 9th March 23:59:59 and you will receive a free £10 bet on each day of the Cheltenham Festival, 10th, 11th, 12th and 13th of March 2015 to use on Cheltenham races for that particular day.
http://www.ladbrokes.com/tc/textchelt/
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Tuesday March 10th - Day One
1:30 - Supreme Novices Hurdle
1) William Hill £25 refund as a free bet if your horse doesn't win in the 13:30 Cheltenham http://www.williamhill.com/supreme
2) Paddy Power £50 refund all losing single stakes on the Supreme Novices Hurdle (13:30 Cheltenham) as a free bet if Douvan wins.
3) Sky Bet £25 refund - Place a bet on the 13.30 Sky Bet Supreme Novices' Hurdle. If your horse doesn’t win we will refund win singles and the win part of each way singles on your FIRST bet placed on the race as a free bet up to £/€25 the same day! http://www.skybet.com/landing/moneyback
4) Coral - Place a £20+ Win Single or £10 Each Way Single on the Supreme Novices Hurdle 1.30 Cheltenham Tuesday 10th March 2015 and get a £5 free bet for every winner Ruby Walsh rides on the opening day of this year's Cheltenham Festival. http://www.coral.co.uk/sports/offers
5) Bet Mclean £25 refund - Cash back if Douvan wins the Supreme Novices Hurdle; http://www.betmclean.com/Promotions
6) Betdaq £25 winnings boost - If a customer places a winning Back bet on the 1st Pricewise Selection* in the Racing Post at the Cheltenham Festival (10/03/2015-13/03/2015), we will credit the customer’s account with a Bonus free bet of a 100% boost on winnings, up to £25. http://www.betdaq.com/UI/?pc=CHELT15
2:05 - Arkle Challenge Trophy
7) Paddy Power £50 refund all losing single stakes on the Arkle Chase (14:05 Cheltenham) as a free bet if Un De Sceaux wins. http://www.paddypower.com/bet/money-back-specials
8) Boyle Sports £25 refund on Un De Sceaux if he fails to win The Arkle (14:05 Cheltenham) http://www.boylesports.com/promotions/
5:15 - Centenary Novice Chase
9) Bet Vernons £50 refund - If your horse doesn't win but finishes 2nd in one of our chosen races, we will refund your stake as a free bet up to £50. Day 1 – 5.15 Centenary Novices Handicap Chase. https://www.vernons.com/promo…/cheltenham-money-back-for-2nd
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Wednesday March 11th - Day Two
1:30 - Neptune Investment Hurdle
1) Sky Bet £25 refund - Money Back if your horse finishes 2nd or 3rd in the 13.30 Neptune Novices' Hurdle http://www.skybet.com/landing/moneyback
2) Betdaq £25 winnings boost - If a customer places a winning Back bet on the 1st Pricewise Selection* in the Racing Post at the Cheltenham Festival (10/03/2015-13/03/2015), we will credit the customer’s account with a Bonus free bet of a 100% boost on winnings, up to £25. http://www.betdaq.com/UI/?pc=CHELT15
2:40 - Coral Cup
3) Bet Vernons £50 refund - If your horse doesn't win but finishes 2nd in one of our chosen races, we will refund your stake as a free bet up to £50. Day 2 – 4.40 Fred Winter Handicap Hurdle. https://www.vernons.com/promo…/cheltenham-money-back-for-2nd
3:20 Betway Queen Mother Champion Chase
4) Ladbrokes £25 refund - If Sprinter Sacre wins or finishes 2nd in the 2015 Queen Mother Champion Chase on Wednesday 11th March, we will refund losing stakes on every horse in the race (including Sprinter Sacre if he finishes 2nd), as a free bet up to £/€25 http://www.ladbrokes.com/tc/sprintersacre/
5) Betway £50 refund - Place a race winner bet on the Betway Champion Chase (15:20 GMT, March 11) and if Sire De Grugy wins we’ll refund losing bets with a Free Bet equal to your stake up to £50. https://new.betway.com/en/promotionsnew/?lang=en&username=
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Thursday March 12th - Day Three
1:30 - JLT Novices Chase
1) Sky Bet £25 refund - Money Back if the favourite wins the 13.30 JLT Novices' Chase http://www.skybet.com/landing/moneyback
2) Betdaq £25 winnings boost - If a customer places a winning Back bet on the 1st Pricewise Selection* in the Racing Post at the Cheltenham Festival (10/03/2015-13/03/2015), we will credit the customer’s account with a Bonus free bet of a 100% boost on winnings, up to £25. http://www.betdaq.com/UI/?pc=CHELT15
4:00 - Byrne Group Plate
3) Bet Vernons £50 refund - If your horse doesn't win but finishes 2nd in one of our chosen races, we will refund your stake as a free bet up to £50. Day 3 – 4.00 Byrne Group Plate. https://www.vernons.com/promo…/cheltenham-money-back-for-2nd
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Friday March 13th - Day Four
1:30 JCB Triumph Hurdle
1) Sky Bet £25 refund - Money Back if the favourite wins the 13.30 JCB Triumph Hurdle http://www.skybet.com/landing/moneyback
2) Betdaq £25 winnings boost - If a customer places a winning Back bet on the 1st Pricewise Selection* in the Racing Post at the Cheltenham Festival (10/03/2015-13/03/2015), we will credit the customer’s account with a Bonus free bet of a 100% boost on winnings, up to £25. http://www.betdaq.com/UI/?pc=CHELT15
5:15 Grand Annual Chase
3) Bet Vernons £50 refund - If your horse doesn't win but finishes 2nd in one of our chosen races, we will refund your stake as a free bet up to £50. Day 4 – 5.15 Grand Annual Chase. https://www.vernons.com/promo…/cheltenham-money-back-for-2nd