Suggest me fast free ways to index backlinks

I am currently using a free version of GSA SEO Indexer but I don't found it that much useful as it only submits 50 sites and few are only domain based they don't even accept complete URL of our backlinks.

So can you guys please suggest me some fast way to get indexed ??

Please if you are going to suggest social bookmarking then please suggest me some ways to boost social signals with less efforts, I don't want to do manually bookmarking.

I am using Link Index inject, It is not that fast but does the work within 2-3 days I am still testing it Being Honest I like the tool but I hope that Indexing should be more fast

elite indexer works good for me..