This week, five software stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

Envivio, Inc. (ENVI) is progressing from last week’s rating of B (“buy”) as the company improves to an A (“strong buy”) this week. Envivio provides software-based IP video processing and distribution solutions to mobile and broadband service providers, cable multiple system operators, and direct broadcast satellite service providers and content providers. In Portfolio Grader’s specific subcategories of Earnings Momentum, Earnings Revisions and Sales Growth, ENVI also gets A’s. For more information, get Portfolio Grader’s complete analysis of ENVI stock.

This is a strong week for Giant Interactive Group, Inc. Sponsored ADR (GA). The company’s rating climbs to A from the previous week’s B. Giant Interactive Group develops and operates online games in the People’s Republic of China. For more information, get Portfolio Grader’s complete analysis of GA stock.

This week, Intuit (INTU) is showing significant improvement as the company’s rating hops from a C (“hold”) to a B (“buy”). Intuit develops and markets business and financial management software solutions for small and medium sized businesses, financial institutions, consumers, and accounting professionals. For more information, get Portfolio Grader’s complete analysis of INTU stock.

Perfect World Co., Ltd. Sponsored ADR Class B (PWRD) boosts its rating from a B to an A this week. Perfect World develops and operates online games. For more information, get Portfolio Grader’s complete analysis of PWRD stock.

Evolving Systems, Inc. (EVOL) is seeing ratings go up from a C last week to a B this week. Evolving Systems is a software company providing business and operational support services and solutions to the telecommunications industry. For more information, get Portfolio Grader’s complete analysis of EVOL stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.