Macupdate has a paragon software bundle available for $29.95 USD, I use NTFS for Mac and HFS for Windows extensively and they work a treat, make sure to upgrade to the latest version if you are using Yosemite.
For the next 3 days, we're discounting all 4 of Paragon Software's cross-platform tools to just $29.95. That’s 60% off the regular price!
Included in the Paragon Mini Bundle is:
NTFS for Mac 12 - Paragon NTFS for Mac allows you to create, delete, and modify files in NTFS-formatted drives in just minutes. The first solution to support OS X 10.10 Yosemite!
HFS+ for Windows - This utility addresses a similar problem that PCs have, enabling Windows to completely access HFS-formatted Mac volumes.
Camptune X - Resize your Boot Camp partition in minutes without the complex steps required by OS X.
ExtFS for Mac - Bridges file system incompatibility between Linux and Mac by providing full read and write access to Ext2/3/4 volumes.
$29.95 USD which is about 60% off the regular old price, Deal expires 4pm AEDT 17/11/2014
I already own these, but for anyone wondering: these drivers have all performed really well for me.