GoldWave is a classic (with more than 20 years of development history) and very professional lightweight (less than 10 MB) digital audio editor from Canada, with the most advanced and complete audio editing features in the same heavyweight software.
Cool Edit Pro (its next generation of successor is the current Adobe Audition) is a powerful, excellent multi-track recording and digital audio editing software developed by Adobe Systems company. Many users described it as an "audio painting" program, which is enough to see its technical background with flexibility and usability.
Every time meet with favorite songs, many of us might want to sing them out with music, yet often it's not easy to find the suitable accompaniment music. In this case, we can use DART Karaoke Studio (AKA: DART Karaoke Author) to product custom Karaoke songs from our favorite music personally.