Merlin Bird ID is a highly-acclaimed bird identification app for mobile platforms, developed by Cornell Lab of Ornithology in 2014. Unlike any similar app, it's powered by eBird, the largest bird database in the world, and its mission is to educate and protect birds and nature. Best of all, it's completely free to use. So, it has been regarded as the ultimate tool for identifying birds through a variety of methods.

In the last century, almost all photos were on paper, and there were many beautiful and precious memories in them. With the development of technology, the storage method of digital photos has become relatively more convenient and safer. Therefore, many people want to scan old paper photos into electronic versions, store them in computers, and even browse them at any time through their mobile phones or share them with relatives and friends. At this time, in addition to computer software like PhotoGlory that can help you do this, now you have a better choice on smartphone, PhotoScan.

Easy Voice Recorder is a convenient and useful audio recorder and sound recorder for mobile platforms. It is designed to be simple, intuitive and friendly, allowing you to effortlessly capture and save important moments. Whether you are a student, a business professional, or a musician, this app caters to your specific needs.

ArtRage is a digital painting application that offers a realistic and intuitive experience for artists of all levels, developed by Ambient Design from New Zealand. It comes with intuitive user interface, various tools and features, allows users to create stunning artworks on their digital devices, simulating the feel and appearance of traditional art materials.

F-Droid is an installable catalogue of FOSS (Free and Open-Source Software) applications for Android platform, founded by Ciaran Gultnieks from United Kingdom in 2010. It is community driven, and makes it easy to browse, install and keep track of application updates on your Android devices.