1. Joseph Haydn: Mozart had a close relationship with the renowned Austrian composer, Joseph Haydn. Haydn greatly influenced Mozart's musical style, and they often exchanged ideas and techniques. Mozart dedicated some of his compositions, including a set of string quartets, to Haydn.
2. Antonio Salieri: Salieri was another prominent composer who worked in Vienna during Mozart's time. Although their relationship was sometimes portrayed as antagonistic in later lore, Mozart and Salieri did collaborate on a few occasions, such as a scene in the opera 'Les Horaces'.
3. Ludwig van Beethoven: Beethoven, who was about a decade younger than Mozart, arrived in Vienna towards the end of Mozart's life. While there is no evidence of direct collaborations between them, Mozart reportedly praised Beethoven's talent, recognizing his potential.
4. Leopold Mozart: Mozart's father, Leopold, was a renowned violinist, composer, and music teacher. Leopold played a significant role in Mozart's musical education from an early age and accompanied him on tours throughout Europe.
5. Karl Ditters von Dittersdorf: A Bohemian violinist and composer, Karl Ditters von Dittersdorf was a colleague and friend of Mozart's. They enjoyed a mutual respect for each other's musical abilities and shared ideas and inspirations.
6. Maria Theresa von Paradis: Maria Theresa von Paradis was a blind pianist and composer whom Mozart met in Vienna. He wrote a concerto for her (Piano Concerto No. 18 in B-flat major, K. 456), which she performed successfully in public.
These are just a few examples of the many musicians with whom Mozart interacted and worked during his lifetime. His talent and the connections he formed contributed to his reputation as one of the most celebrated classical composers in history.