RingCraft

This is by far not only the best accessible ringtone maker out there, but the most accessible audio trimming method I have ever used. You just import any file, video or audio, select the start and end times while listening, then you can individually preview the start, the end, and the whole thing altogether. Made a mistake? Just reselect and preview again. Another awesome part is that you don't even have to use an audio file. You can use video too, which means you can literally screen record any sound effect you want on YouTube and use it as a ringtone! The trimming means that any sounds from voiceover can be easily removed. I have found only two downsides. One is that the notification mode and ringtone mode don't seem to make a difference. They're all saved under ringtones. The second is that as soon as you select use as ringtone it changes your default ringtone to the new one which is frustrating if you want to, say, just make a ringtone for a specific contact, but it's not that big of a pain to fix. I recommend it to anyone who wants an easy way to customize their devices.