Software
Tools built by my group and collaborators. Research that ships: each of these exists to put our findings about onboarding, retention, and sustainability into the hands of real communities and classrooms.
OSS-Doorway
A gamified GitHub environment that scaffolds students through the open source contribution process — quests, XP, levels, and a bot that gives real-time feedback as students submit pull requests, write documentation, and solve issues. Evaluated in multiple classrooms; boosts self-efficacy and GitHub familiarity. Part of the NSF HSI project.
FLOSScoach
A portal that helps newcomers overcome the most common barriers to joining open source communities, organizing project information in a standardized way grounded in our barriers research (IST 2015, ICSE 2016). The original tool from my PhD work — still the reference point for newcomer-support portals.
DisTrac
Forecasts core-developer inactivity in open source projects from contribution rhythms, building on our EMSE 2022 inactivity study. Developed with Fabio Calefato and colleagues at the University of Bari. Tool paper in submission (ICSME 2026 Data and Tools track).
GiveMeLabeledIssues
An open source issue-recommendation system that matches contributors to issues needing their skills, based on API-domain labeling (MSR 2023).
CommUnityBuddy
A conversational agent that mentors newcomer developers in open source communities, funded by the Alfred P. Sloan Foundation. In active development with OSS community partners.