Finding plagiarism on Stack Overflow
Charcoal's SmokeDetector, detecting spam around the network.
Bot to track badges
A bot notifying when a user reaches a certain flag count
A bot to notify room owners and bot maintainers that are currently active in the room.
Thunder is a bot that checks if other chatbots in a certain room are running.
Bot to monitor tag wiki edit suggestions
Supplementary back-end analysis for Charcoal / SmokeDetector / metasmoke