Oh there are so many out there but I have tried to give a list of the most popular. All the info I have given is from the internet. Here we go.
Tim Holtz® Distress Ink Pads
Tim Holtz Distress Inks are a collection of 36 acid-free, non-toxic, fade resistant, water-based dye inks. They’re perfect for the new vintage, stained, aged effect crafters are creating in their altered books, scrapbook pages, cards and paper craft projects. Tim selected the colour and helped develop these inks to produce a realistic, weathered look on paper, photos and decorative fibres. All the colourful Distress Inks afford added versatility when photo tinting and colour layering with the original, award winning tones. The 2" x 2" pads are made with a higher raised felt for easier use with direct to paper techniques, Re-inkers available in .5 oz. amber glass bottles with eye drop applicators.
For more info try here
Adirondack® Dye Ink Pads
Rich, realistic Earthtones, pastel Lights and vibrant Brights for color-coordinating with the popular Adirondack product line. Raised above the case, our pad allows easy use of any size rubber image, brayer, or for direct-to-paper techniques.
For more info try here http://www.rangerink.com/tips/tips_adirondackPigmentInkPaperCrafting.htm
Memento™ dye ink is fast drying and fade resistant. The innovative pad delivers finer impressions and exceptionally even coverage and you can get the same great dye ink in a marker! Memento™ markers are dual tip - one end has a brush tip and the other a bullet tip. Memento products are available in 24 wonderfully fresh colors.
StazOn is our only solvent-based ink, designed for decorating non-porous and semi-porous surfaces, such as metal, shrink plastic, acrylic, cellophane, aluminum foil, leather and some glass surfaces. Thanks to its mild smell, StazOn is much safer to use than other permanent inks. Wide mouth bottles are available for all 31 colors. For everything from industrial projects to home decor, StazOn is sure to remain the top crafting ink! Cleanup is easy with StazOn All-Purpose Cleaner. Use StazOn with our Sponge Daubers and Fantastix applicators for easy sponging techniques!
For ideas on how to use these check out You Tube there are some fab videos over there.