B4A (formerly called Basic4android) is a powerful, friendly and free rapid application development tool for creating native Android applications, developed by Anywhere Software (Erel Uziel) from Israel. It serves as an alternative to Java programming, utilizes an object-based language and event-driven architecture, resembles Visual Basic and Visual Basic .NET, but is specifically tailored for the native Android environment.

The terminal program under Windows has always been a problem. The default CMD is old and has a single function and poor usability. Although it has been replaced by the more powerful PowerShell, it is still not friendly enough, and even modifying its font is a troublesome thing. If you are looking for an alternative to CMD and PowerShell, then ConEmu is a rare terminal alternative for Windows.

If we use the built-in firewall of Windows to prevent the specified programs from connecting to the Internet, we need four steps at least: 1) Enter the Control Panel; 2) Open Windows Firewall; 3) Click Advanced settings; 4) Add new rules. If you want to simplify firewall operation (preferably one-click) and can't stand the high system resources occupancy of third-party firewalls, then Firewall App Blocker is probably what you're looking for!

Environment variable generally refers to some parameters used in the operating system to specify the running environment of system and software, such as: temporary folder location, and system folder path. Modifying environment variables is a common thing for both programmers and system administrators. But the Windows' built-in environment variable editor is notoriously unfriendly (for example, the value of "Path" variable is not only displayed on a single line, but also separated by commas, which is very easy to be missed out and cause unnecessary trouble).

Luminar is a rising full-featured image post-processing software for Windows and Mac, developed by Skylum (formerly called Macphun) in 2016. It is similar to Adobe Lightroom in functionality, and is more convenient and easy to use than Adobe Photoshop. In just a few years, it has become the most popular photo editor for photographers.