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Block Posters

www.blockposters.com Allows you to choose an image from your computer, upload it, decide how large you want it to be, download the resulting PDF, then print it out. Simples!

Picozu - sharing creativity

Picozu is a drawing and photo retouching application built on Javascript, HTML 5 and CSS3. Make sure you use a modern browser (Firefox 5, Safari 5, Chrome, Opera 10, Internet Explorer 9) if you want to play with it.

The aim of Picozu is to support brushes, filters, dynamic windows, HSL, CYMK, layers, actions history, batch processing, primitives, curves (quadratic and bezier), complex polygons, texture rendering, cropping and many more.

ImageOid

Image Effects. Straightforward image manip program that lets you create various effects. Still in beta. No 'about', so can't tell you any more really.

Photovisi

Photovisi - Collage photo effects. They have developed a free and easy way for people to make photo collages online and offer several creative templates and options. The process is easy. First, the visitor chooses one of the many templates. Next, they add their own photos to make it unique, with options to edit images however they like. Finally, once the collage is done, it can be downloaded and shared with the world.

Looks nice and simple, easy to use with good results.

instagr.am

instagr.am. It's a fast, beautiful and fun way to share your life with friends through a series of pictures. Snap a photo with your iPhone, choose a filter to transform the look and feel, send to Facebook, Twitter or Flickr - it's all as easy as pie. It's photo sharing, reinvented.

BeFunky

This is a nice simple resource if you want to do Photo Effects and Photo Editing with One Click  It really has a lot of different functions, such as adding shapes, text, speech bubbles, photo effects, basic photo editing such as brightness, contrast and saturation. It also has unlimited photo storage.

EasyMoza

Free Online Photo Mosaic Creator. Use your own photos Very user-friendly No software download No registration  NEW: Free low resolution download! If you like the result, you can save your photo mosaic to your computer. Print the photo mosaic yourself or print it at your local printshop.

Textures for photographs

Startextures.com. Lots of free textures in different sizes. If you like playing with your pics, you might enjoy these.

roflbot

Add text and captions to your pictures. Roflbot is for adding text to a picture, a.k.a. an image macro generator. You can do it all in your browser without using Photoshop.

ThePicLab

Your online photo editor . Easy to use - with a fair variety of filters to play with. Good if you want to do things with your pictures but don't feel confident in using a full size editor.