SilverNote is described as 'The best way to take notes for school or work. SilverNote's key to success is offering better technology rather than more technology. Notes are simply blank canvases where you can place anything anywhere you like' and is a Note-taking App in the Office & Productivity category. There are more than 50 alternatives to SilverNote for a variety of platforms, including Windows, Android, Mac, iPhone and Online / Web-based. The best alternative is Joplin. It's not free, so if you're looking for a free alternative, you could try Standard Notes or Microsoft OneNote. Other great apps like SilverNote are Evernote (Freemium), Simplenote (Free, Open Source), CherryTree (Free, Open Source) and Zim (Free, Open Source).
Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor.