Leetchi is described as 'Money pots for all your group projects, expenses and gifts'. There are three alternatives to Leetchi for Online / Web-based. The best alternative is cagnotte.me. It's not free, so if you're looking for a free alternative, you could try Splitted.
Le Pot Commun makes group spending very easy. It's simple, fast and secure. It's ideal for organising group gifts (birthday, housewarming, farewell parties, etc.), and events (holidays, New Year's party, weekends with friends).