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SmallPDF
SmallPDF is a powerful online tool for PDFs.
It can not only compress, merge, rotate, split PDFs, but also decrypt encrypted PDFs.
You can also convert Word, Excel, images, and PDFs to and from each other.
In short, all kinds of needs about PDF can basically meet you, and it also supports Chinese.
Trello
Trello is a free project management software that uses a card-like interface for task management.
Users can create boards, lists on boards, and cards on Trello to represent different tasks.
Trello is characterized by a clean and intuitive interface. It uses cards as the smallest task unit, and uses the drag and drop of cards to quickly change the task status, which is very flexible.
Users can easily comment on cards, add checklists, tags, take screenshots, etc., to enhance the richness of task information. It also supports file attachments and integration with third-party apps.
Multiple team members can share the same board and see real-time updates on task progress.
Trello enables online collaboration on project tasks and increases team productivity.
TreeSize
TreeSize is a particularly powerful disk analysis tool.
It can show the size of the directory in detail. You can also use blocks to show the size of folders, and you can also distinguish between different file types. With it, the contents of the disk can no longer be hidden.
You can also put it in a USB flash drive and carry it with you at any time.
The Pro version can also export the results of the scans, while also searching for files and discovering duplicate files.
Only Windows version, Chinese is supported.
Snow leopard clears quickly
Snow Leopard Quick Clean is a particularly easy to use file management and file cleaning software.
You can use it to quickly find file junk, such as software caches, and clean up leftover packages such as files, ad junk, and so on. Efficiency's mobile phone detected more than 20 G garbage cleaners at once.
At the same time, it also has a quick file search function, which is particularly useful, so you can find the files you want in an instant. At the same time, it also has a super search, such as searching for specific file types, extensions, etc.
It also has a lot of toolboxes, such as image tube images, viewing similar images, and so on. And the software is all free, only available for Android.
Notability
Notability is a note-taking and PDF annotation app.
Whether you're handwriting, drawing, or scanning a document, you can easily edit annotations to it.
It's basically paperless, and you can use it to write notes by hand, create to-do lists, and record your voice.
You can also easily drag and drop files, pictures, and photos from other apps.
It supports almost all document and slide formats, edit at any time, and save the network disk at any time.
Other similar ones include Nebo and GoodsNote, and everyone can experience the experience.
CX file manager
Cx File Explorer is a free, ad-free file manager.
It has a clean, intuitive Material Design interface that is very smooth to use.
Cx File Explorer allows you to access your Android device's internal storage and external SD card, as well as network storage such as NAS, Dropbox, Google Drive, and more.
It can perform common file operations, including cutting, copying, deleting, renaming, compressing and decompressing, etc.
In addition, Cx File Explorer also provides useful functions such as cloud backup, APK installation management, and hidden folders.
Ashampoo WinOptimizer（阿香婆系统优化工具 ）
WinOptimizer is a more conscientious cleanup software.
It supports one-click optimization of computer, disk cleanup, registry cleaner, network cleaner, debris cleaner.
It also supports disk analysis, performance testing, file shredding, file recovery, and other functions.
It's powerful.,Simple operation.,There's also a Chinese version.,It's stress-free for everyone to operate.