What kind of digital instruments the HR manager can't work without?

There are many digital instruments, who contribute to systemize the work of the recruiter: database for the applicants, personalized instruments for recruiting the applicants using social media. There are also created several applications, who facilitate the searching and attraction of new people. However, they are all outside solutions. Many mistakenly narrow the selection field, looking only outside the company. Inside the company, can be found enough candidates to fill the vacant spaces. We know that internal selection is a powerful instrument for managing the corporative culture, the people flue, and personal loyalty, but for now, it still can't be defined as a popular way amongst the HR specialists. The digital instruments who are helping the HR manager to be in sing with the life of the organization are extremely necessary for highering employees. More and more often we observe the companies who are forgetting their own applications who measure the organizational climate and help the work with personal. The question remains: What kind of digital instruments the HR manager can't work without?