While the proven Zacks Rank places an emphasis on earnings estimates and estimate revisions to find strong stocks, we also know that investors tend to develop their own individual strategies. With this in mind, we are always looking at value, growth, and momentum trends to discover great companies.

Of these, perhaps no stock market trend is more popular than value investing, which is a strategy that has proven to be successful in all sorts of market environments. Value investors use a variety of methods, including tried-and-true valuation metrics, to find these stocks.

In addition to the Zacks Rank, investors looking for stocks with specific traits can utilize our Style Scores system. Of course, value investors will be most interested in the system's "Value" category. Stocks with "A" grades for Value and high Zacks Ranks are among the best value stocks available at any given moment.

One company value investors might notice is Blackbaud (BLKB Quick QuoteBLKB - Free Report) . BLKB is currently sporting a Zacks Rank #2 (Buy), as well as a Value grade of A. The stock holds a P/E ratio of 14.41, while its industry has an average P/E of 22.05. BLKB's Forward P/E has been as high as 19.64 and as low as 13.39, with a median of 15.04, all within the past year.

Value investors also use the P/S ratio. The P/S ratio is calculated as price divided by sales. This is a popular metric because sales are harder to manipulate on an income statement, so they are often considered a better performance indicator. BLKB has a P/S ratio of 2.05. This compares to its industry's average P/S of 3.72.

These are only a few of the key metrics included in Blackbaud's strong Value grade, but they help show that the stock is likely undervalued right now. When factoring in the strength of its earnings outlook, BLKB looks like an impressive value stock at the moment.