Adobe Acrobat Reader is a PDF creation and document editor application that puts your office in your pocket. It allows you to view, annotate, fill in, sign and share PDFs for free. Sejda (Web, Windows, Mac, Linux) is another great option for editing text and creating PDF forms for free. LightPDF is one of the best free PDF editors available with a collection of features such as converting, annotating, digitally signing and password-protecting.
Nitro is a very impressive program that advocates the easiest way to improve productivity in the management of PDF files. It has a wide range of ready-to-use features designed to simplify PDF workflows. Smallpdf is another free and portable PDF editing application with an easy-to-use interface similar to Microsoft Word. Wondershare PDFelement is a powerful program with features to help you work with any PDF-related task. It allows you to insert page numbers, add images and texts, digitally sign and encrypt your file with a password.
Adobe Fill and Sign is another great application for editing PDFs on Android. It has fewer customization options than other apps but it allows you to fill out forms quickly and easily. CloudConvert is also a great option for converting anything into a PDF or converting your PDF back into a document and editing everything it contains. Finally, OCR can be used to recognize scanned text, combine or divide PDF files, write data and create detailed forms.