Managing millions of tasks, Todoist is an online task management app and todo list. It has Web, iPhone, Android, Chrome, Firefox, Outlook flavors (and more!).
Reply to interested prospects and put their next step on your task list.
Get a relevant reply when the next step is open, plus a task that tells your rep what the prospect said and what comes next.
Send a relevant follow-up when a prospect goes quiet after your reply.
Keep early sales conversations moving with relevant follow-ups, and see a task when a prospect replies.