Gives great value for your money
SharePoint Column/View Permission, a SharePoint add-on from BoostSolutions (formerly SharePointBoost), provides functionality that many SharePoint admins sorely miss--hidden/read-only columns in lists, hidden/read-only views, setting default views per user or group, etc.
At $899 per WFE for the full product and $299 for a "lite" version that includes the most essential features, the Column/View Permission pricing is more than reasonable given that building features that do what this product does would take many, many hours of custom development. In addition, the product works for both SharePoint 2010 and SharePoint 2013 so there's no upgrade issue.
I gave this product a rating of 5 based on the amount of functionality you're getting for the money.