Votum for Slack - Crowdsourced lists with upvotes, inside Slack
Calamari - Calamari helps organizations, companies, and enterprises to manage their human resources in an easy and compliant way by delivering modern and easy-to-use time tracking and attendance management tools.
Must-Read for Slack - Build controllable must-read lists for your team in Slack.
Sage HR - Sage HR is a one-stop shop for your HR management needs. Your HR - simplified!
Corpus - Curate, take notes and share your reading list
TimeOffManager - TimeOffManager.com provides a fully automated online system for tracking and managing employee absence, leave, paid time-off and attendance.