I had developed vt7 Kanban, Sales funnel & many more extensions for my clients. If you give me a time I'll show you a demo with TeamViwer or Skype.
Relevant Skills and Experience
Late 12 years I am doing the Vtiger related developments. In vt7: I has finished 6 full projects, 4 extensions, 23 custom modules , more than 50 custom workflow functions & lot's of customization
Proposed Milestones
$250 USD - Sales Funnel module
$250 USD - Kanban extension
$75 USD - workflows & workflow custom functions(Depending on your requirements)
$91 USD - For other customization's (Depending on your requirements)