As of July 2015, About.com offers several examples of recommendation letters for employment. MIT Admissions and University of Virginia's Center for Engineering Career Development both provide models of recommendation letters for students.
About.com provides examples of business letters of recommendation, including ones for employees who are seeking other jobs, applying for promotions or moving on from summer positions. Other samples are specifically from a personal employer or a manager. In addition, a personal letter of recommendation demonstrates how to write about someone who is not a business associate. In addition, a link connects to a page that offers advice on writing recommendation letters.
MIT shows several examples of recommendation letters from teachers and guidance counselors for students who want to get into the school. A critique accompanies each sample and explains how effective the letter would be in the admissions process. Also, an introduction explains what type of information is useful in a higher education recommendation letter.
UVA displays three sample letters. The first two are positive letters for students who want to get into graduate programs. The third letter is a business recommendation that is not supportive of the candidate. In addition to the letters, the webpage also explains what content goes in each section of the recommendation letter.