Although I still have not yet acquired a lot of experience in the field of Graphic designing, I have been using many apps for my works in this sector. Many of them have been productive, but I would recommend only a few of them to my fellow readers, that are the most valuable ones.
Photoshop
One of the most popular apps available for excelling in the field of graphic designing, Photoshop can easily help you in combining multiple images as well as remove unnecessary parts from an image. There are multiple options here, which I found quite useful and would recommend to everyone. Among them, the basic functions include, straightening, cropping, flipping and rotating.
Gravit Designer
This app was earlier known only by the name of Gravit. This useful app is a suitable for every kind of job, from presentations, animations, illustration and designing icons. The best part which I loved about Gravit Designer is its intuitive and clean interface that adjusts according to your needs. Some other features that I enjoyed the most are knife tool, path graphs, multiple fills along with blending modes, to name a few.
Vectr
One of the preferable apps by graphic designers, I found this app extremely useful and appealing too. The best part about this is that it is available both as a desktop app as well as a browser-based one. It is ideal for developing 2D vector graphics. While using Vectr, I thought it is one of the most versatile apps available. Another feature that attracted me the most is the availability of options for synchronization and live collaboration. It will enable you to work with anyone anywhere together.
Inkscape
This particular app is also known as a free counterpart to another app, Adobe Illustrator. One of the great choices for graphic designers, this application has a wide variety of advanced effects and tools. These include node editing, path-based text, bitmap tracing and much more.
It is similar to other vector editing applications in the sense that its main format is scalable vector graphics also known as SVG. I would personally recommend this application to users, for having a great experience while working in this field. It is available for Linux, Mac, and Windows.
Krita
Another highly useful app available to graphic designers, the sole purpose of its creation is to assist graphic designers and artists with as much help as possible. Well, I would agree with it and its utility in my line of work. If you are a comic book artist, then Krita will be of utmost help to you and your work.
With a bunch of wonderfully designed tools that include halftones and the availability of pre-made templates, this app is one of the best ones available in the market. It also assists in every form of drawing. The availability of a wide range of drawing features such as smooth shapes, vanishing points, selection functions and layer masks, makes this app one of a kind.
GIMP
One of the most brilliant graphic designing tools available at present, the wide range of features it provides, makes it worth it. GIMP is simply outstanding while crafting a digital painting or while you are involved in the composition of different elements. There are a few issues with it, but the availability of filters, advanced brushes, masks, and layers, makes this app a highly useful one.
Blender
It is an entirely free content creation app for users. Blender has many services available for you such as rigging, modeling, rendering as well as animation. I have found this app a very useful one, for its simple interface and utility in my line of work.
You can also customize its interface in your way as well as create your extension and tools that will suit you.
Doodle Buddy
It is one of the best applications available to IOS users. It is known for its assistance in painting, scribbling, sketching and drawing, this app is growing increasingly popular with time. There are over 44000 colors that you will get access to while using this app and will further assist your creative process.