Evernote supports a wide variety of note types (text, images, audio memo, sketches, scanned documents, checklists, and clipped web pages). It has excellent tools for organizing and searching your notes as well.
(Supported by SIT)
Using OneNote, you can type text, drag and drop images and file attachments into notes, use a digital highlighter, create checklists, record audio, draw sketches, and more.
Scan and upload images of handwriting, such as a picture of a whiteboard with notes, and Microsoft's optical character recognition (OCR) will make all the writing searchable.
Google Keep helps your notes flow seamlessly across scenarios and apps. You can type, draw, or add an image (on mobile, you can even use your voice).
If you use the Google Keep Chrome extension, you can save URLs, text, and images as you browse the web. Everything you save in Google Keep stays synced across all platforms that you use.
Milanote caters directly to designers and other visual thinkers, but it's not for sketching. It's more of a pasteboard or pinboard, presenting a canvas on which you can paste images, arrows, text blocks, checklists, and other elements.