The best alternatives to CoffeeRunner are needs, Large, and Evabot for Slack. If these 3 options don't work for you, we've listed a few more alternatives below.
Xpertz allows colleagues to use expertise tags to showcase the skills they bring to the team. Search for people to collaborate with based on skills, and validate those interactions resulting in leveling up of those skills to show off to your coworkers!
Workplace friendship& mentorships can all start with a simple coffee or lunch program. With just one click, LEAD.Bot introduces coworkers from different teams & locations via direct message, encourages them to meet up for (virtual) coffee, chat or mentoring.