Free online image editor. Has most of the commonly-needed tools. Easy to use.
Easy to use photo-editor. Quickly filter, resize or edit your photos for free. Unlimited use and no watermarks.
The built-in editor on most phones will enable you to crop, draw over images, apply a filter, adjust brightness and contrast. If you want more advanced tools a variety of apps are available. Some of the better ones include Snapseed, Adobe Photoshop Express and Fotor, Another option is Prisma which turns your photos into artworks (see example on the right). Most have free versions which often contain ads. More options here.
Lists pros and cons. The main negative with most online editors is ads in the free versions or a limited number of available tools.
You can store images in Google Drive and Google Photos. University or School accounts have unlimited storage. Google Photos in personal Gmail accounts allows free storage of reduced size images, they are still large enough for most purposes.
Most photo editors have a tool for blurring faces. The standard photo editing tool included with most phones will enable you to blur, draw over and/ or place a sticker over faces.
An ePortfolio site which has a drawing tool that allows you to add audio or text, annotate over photos or draw.