Gaby and Lindsay help us with (American) English by publishing podcasts four times a week on their site
All Ears English. Every week the podcasts respectively deal with vocabulary, American culture, strategies for learning English and with motivation and inspiration to learn. The level is suitable for intermediate to advanced English students.
On the downside, the transcripts are only available through subscription, although I feel they are good value for money.
Each podcast lasts around 10 minutes, and Gaby and Lindsay make a point of inviting guests to take part in their podcasts, which contributes to the variety of accents and ideas for students to improve their English.