Project management software isn't new. Perhaps you've used tools like Trello or Jira, both of which are products from Atlassian ( TEAM -0.42% ), the largest independent provider of workflow management software. While tech tools like this are a niche in the end-user software realm, they've done pretty well for investors. Since Atlassian made its debut back in December 2015, shares have provided a tidy 840% return. Even after that run, Atlassian is still far from a software industry giant, with an enterprise value ( market cap plus debt minus cash and equivalents) of about $64 billion.