One top brand that manufactures this accessory is Knit Pro, and this particular manufacturer supplies it chart keeper to retailers around the world, making it easy to get hold of. Knit Pro also has a number of other accessories that knitters might find useful, ranging from sock blockers to needle sizer.
Many of these mats on the market are coated with heat and water resistant material, allowing for steam, wet blocking and pressing. Many mats on the market can simple be rolled up when the user has finished working on their project for the time being and then be stored away safely and securely.
Other types of stitch markers on the market today can be clipped onto you project when needed, and then clipped as required. These allow the individual who is working on the pattern to come back to a certain place in the design later in the project, leading to a great deal of precision in the creation of the project.
Other smaller accessories that can be particularly useful when working on a knitting project are stitch markers, which can be used to mark particular points in a pattern that you are working on. These often come in the form of small rings which can simply be slipped onto your knitting needles as you knit.
Knitty.com is an online magazine where designers post their patterns you may download for free. Have fun and start creating, knitting and crocheting for babies and children!