Candidates For The Encryption Algorithm

After browsing so many web pages that posted by both professional and unprofessional cryptographers. I finally found out that there are few terms that appeared in most occasions, they are the followings

• AES (Advanced Encryption Standard)
• DES (Data Encryption Standard)
• IDEA (International Data Encryption Algorithm)
• Blowfish
• RC 5 (Rivest's Cipher or Ron's Code 5)

If these encryption systems are the most popular, the safest and the most stable. Then, I would like to use one of these encryption systems as my default encryption algorithm in my program.