Here's a list of 7 tools that can be useful for custom software development:

1 A source control platform: this tool allows the development team to collaborate on the same code and track changes over time.

Some popular options include Git, Mercurial and Subversion

2 A project management tool: this tool helps development teams plan, track, and organize project progress.

Some popular options include Asana, Jira and Trello

3 A testing tool: this tool allows development teams to test the software to ensure that it is free of errors and functions properly.

Some popular options include Selenium, JUnit and TestNG

4 A performance monitoring tool: this tool allows development teams to monitor software performance and detect performance issues.

Some popular options include New Relic, AppDynamics and Dynatrace.

5 A continuous integration tool: this tool allows development teams to automate the process of building and testing software whenever a change is made to the code.

Some popular options include Jenkins, Travis CI and CircleCI.

6 A code analysis tool: this tool allows development teams to analyze code to detect quality and security issues.

Some popular options include SonarQube, CodeClimate and Veracode.

7 A documentation tool: this tool is for development teams to document code and the development process to make it easier for others to understand and maintain the software.

Some popular options include Doxygen, Javadoc and Sphinx.

It's important to note that this is just an example list and that the tools that work best for a development team can depend on many factors, such as the programming language used and the specific needs of the project.